Upgrades

1-Point Upgrades

The following Upgrades cost 1 point from the eidolon’s evolution pool.

Basic Magic (Sp)

An eidolon learns to cast a basic spell as a spell-like ability. Select one spell from the following list: acid splash, dancing lights, daze, detect magic, flare, ghost sound, light, mage hand, ray of frost, stabilize, or touch of fatigue. This spell can be cast once per day as a spell-like ability. At 4th level, this spell can be cast three times per day by spending 2 additional evolution points. The caster level for this evolution is equal to the eidolon’s Hit Dice. The save DC for this spell is 10 + the eidolon’s Charisma modifier. The eidolon must have a Charisma score of at least 10 to take this evolution. This evolution can be selected more than once. Each time an eidolon selects this evolution, it applies to a new spell. Source: Ultimate Magic

Bite (Ex)

An eidolon’s maw is full of razor-sharp teeth, giving it a bite attack. This attack is a primary attack. The bite deals 1d6 points of damage (1d8 if Large, 2d6 if Huge). If the eidolon already has a bite attack, this evolution allows it to deal 1-1/2 times its Strength modifier on damage rolls made with its bite. Source: Advanced Player’s Guide

Claws (Ex)

An eidolon has a pair of vicious claws at the end of its limbs, giving it two claw attacks. These attacks are primary attacks. The claws deal 1d4 points of damage (1d6 if Large, 1d8 if Huge). The eidolon must have the limbs evolution to take this evolution. This evolution can only be applied to the limbs (legs) evolution once This evolution can be selected more than once, but the eidolon must possess an equal number of the limbs evolution. Source: Advanced Player’s Guide

Climb (Ex)

An eidolon becomes a skilled climber, gaining a climb speed equal to its base speed. This evolution can be selected more than once. Each additional time it is selected, increase the eidolon’s climb speed by 20 feet. Source: Advanced Player’s Guide

Gills (Ex)

An eidolon has gills and can breathe underwater indefinitely. Source: Advanced Player’s Guide

Hooves (Ex)

An eidolon has a pair of sharp hooves at the end of its limbs, giving it two hoof attacks. These attacks are secondary attacks. The hooves deal 1d4 points of damage (1d6 if Large, 1d8 if Huge). The eidolon must have the limbs evolution to take this evolution. This evolution can only be applied to the limbs (legs) evolution once. Alternatively, the eidolon can replace the claws evolution from its base form with these hoof attacks (this still costs 1 evolution point). This evolution can be selected more than once, but the eidolon must possess an equal number of limbs evolutions. Source: Ultimate Magic

Improved Damage (Ex)

One of the eidolon’s natural attacks is particularly deadly. Select one natural attack form and increase the damage die type by one step. This evolution can be selected more than once. Its effects do not stack. Each time an eidolon selects this evolution, it applies to a different natural attack. Source: Advanced Player’s Guide

Improved Natural Armor (Ex)

An eidolon’s hide grows thick fur, rigid scales, or bony plates, giving it a +2 bonus to its natural armor. This evolution can be taken once for every five levels the summoner possesses. Source: Advanced Player’s Guide

Basic Magic (Sp)

An eidolon learns to cast a basic spell as a spell-like ability. Select one spell from the following list: acid splash, dancing lights, daze, detect magic, flare, ghost sound, light, mage hand, ray of frost, stabilize, or touch of fatigue. This spell can be cast once per day as a spell-like ability. At 4th level, this spell can be cast three times per day by spending 2 additional evolution points. The caster level for this evolution is equal to the eidolon’s Hit Dice. The save DC for this spell is 10 + the eidolon’s Charisma modifier. The eidolon must have a Charisma score of at least 10 to take this evolution. This evolution can be selected more than once. Each time an eidolon selects this evolution, it applies to a new spell. Source: Ultimate Magic

Bite (Ex)

An eidolon’s maw is full of razor-sharp teeth, giving it a bite attack. This attack is a primary attack. The bite deals 1d6 points of damage (1d8 if Large, 2d6 if Huge). If the eidolon already has a bite attack, this evolution allows it to deal 1-1/2 times its Strength modifier on damage rolls made with its bite. Source: Advanced Player’s Guide

Claws (Ex)

An eidolon has a pair of vicious claws at the end of its limbs, giving it two claw attacks. These attacks are primary attacks. The claws deal 1d4 points of damage (1d6 if Large, 1d8 if Huge). The eidolon must have the limbs evolution to take this evolution. This evolution can only be applied to the limbs (legs) evolution once This evolution can be selected more than once, but the eidolon must possess an equal number of the limbs evolution. Source: Advanced Player’s Guide

Climb (Ex)

An eidolon becomes a skilled climber, gaining a climb speed equal to its base speed. This evolution can be selected more than once. Each additional time it is selected, increase the eidolon’s climb speed by 20 feet. Source: Advanced Player’s Guide

Gills (Ex)

An eidolon has gills and can breathe underwater indefinitely. Source: Advanced Player’s Guide

Hooves (Ex)

An eidolon has a pair of sharp hooves at the end of its limbs, giving it two hoof attacks. These attacks are secondary attacks. The hooves deal 1d4 points of damage (1d6 if Large, 1d8 if Huge). The eidolon must have the limbs evolution to take this evolution. This evolution can only be applied to the limbs (legs) evolution once. Alternatively, the eidolon can replace the claws evolution from its base form with these hoof attacks (this still costs 1 evolution point). This evolution can be selected more than once, but the eidolon must possess an equal number of limbs evolutions. Source: Ultimate Magic

Improved Damage (Ex)

One of the eidolon’s natural attacks is particularly deadly. Select one natural attack form and increase the damage die type by one step. This evolution can be selected more than once. Its effects do not stack. Each time an eidolon selects this evolution, it applies to a different natural attack. Source: Advanced Player’s Guide

Improved Natural Armor (Ex)

An eidolon’s hide grows thick fur, rigid scales, or bony plates, giving it a +2 bonus to its natural armor. This evolution can be taken once for every five levels the summoner possesses. Source: Advanced Player’s Guide

Errata/FAQ
What’s the minimum level for a summoner to take the improved natural armor evolution for an eidolon?

The description of the evolution says, “This evolution can be taken once for every five levels the summoner possesses.” Unfortunately, that text is unclear. A summoner can select this evolution once for levels 1—4, again for levels 5–9, a third time at levels 10–14, a fourth time at levels 15–19, and a fifth time at level 20. This wording will be clarified in the next update document and print run for the APG.

[Source]

Low-Light Vision (Ex)

An eidolon gains low-light vision, enabling it to see twice as far as a human in conditions of dim light. Source: Ultimate Magic

Magic Attacks (Su)

An eidolon is infused with magic, allowing it to treat all of its natural attacks as if they were magic for the purpose of overcoming damage reduction. If the summoner is 10th level or higher, all of the eidolon’s weapons are treated as the alignment of the eidolon for the purpose of overcoming damage reduction. Source: Advanced Player’s Guide

Mount (Ex)

An eidolon is properly skilled and formed to serve as a combat-trained mount. The eidolon must be at least one size category larger than its rider. This evolution is only available to eidolons of the quadruped and serpentine base forms. Source: Advanced Player’s Guide

Pincers (Ex)

An eidolon grows a large pincers at the end of one pair of its limbs, giving it two pincer attacks. These attacks are secondary attacks. The pincers deal 1d6 points of damage (1d8 if Large, 2d6 if Huge). Eidolons with the grab evolution linked to pincers gain a +2 bonus on CMB checks made to grapple. The eidolon must have the limbs (arms) evolution to take this evolution. Alternatively, the eidolon can replace the claws from its base form with pincers (this still costs 1 evolution point). This evolution can be selected more than once, but the eidolon must possess an equal number of the limbs evolution. Source: Advanced Player’s Guide

Pounce (Ex)

An eidolon gains quick reflexes, allowing it to make a full attack after a charge. This evolution is only available to eidolons of the quadruped base form. Source: Advanced Player’s Guide

Pull (Ex)

An eidolon gains the ability to pull creatures closer with a successful attack. Select one type of natural attack. Whenever the eidolon makes a successful attack of the selected type, it can attempt a free combat maneuver check. If successful, the target of the attack is pulled 5 feet closer to the eidolon. This ability only works on creatures of a size equal to or smaller than the eidolon. Creatures pulled in this way do not provoke attacks of opportunity. The eidolon must have a reach of 10 feet or more to select this evolution. This evolution can be selected more than once. Its effects do not stack. Each time an eidolon selects this evolution, it applies to a different natural attack. Source: Advanced Player’s Guide

Push (Ex)

An eidolon gains the ability to push creatures away with a successful attack. Select one type of natural attack. Whenever the eidolon makes a successful attack of the selected type, it can attempt a free combat maneuver check. If successful, the target of the attack is pushed 5 feet directly away from the eidolon. This ability only works on creatures of a size equal to or smaller than the eidolon. Creatures pushed in this way do not provoke attacks of opportunity. This evolution can be selected more than once. Its effects do not stack. Each time an eidolon selects this evolution, it applies to a different natural attack. Source: Advanced Player’s Guide

Reach (Ex)

FAQ
Summoner: If I choose the reach evolution for my eidolon, how many of its attacks gains increased reach?

The ability description says “pick one attack,” not “pick one attack type.” So if your eidolon has two claws and you pick “claw” for the reach evolution, only one claw gets increased reach. (The reach evolution is intended to let you emulate having a dragon-eidolon, as a dragon’s bite attack has greater reach than its claws.)

[Source]

One of an eidolon’s attacks is capable of striking at foes at a distance. Pick one attack. The eidolon’s reach with that attack increases by 5 feet. Source: Advanced Player’s Guide

Resistance (Ex)

An eidolon’s form takes on a resiliency to one particular energy type, which is usually reflected in its physical body (ashen hide for fire, icy breath for cold, and so on). Pick one energy type (acid, cold, electricity, fire, or sonic). The eidolon gains resist 5 against that energy type. This resistance increases by 5 for every 5 levels the summoner possesses, to a maximum of 15 at 10th level. This evolution can be selected more than once. Its effects do not stack. Each time an eidolon selects this evolution, it applies to a different energy type. Source: Advanced Player’s Guide

Scent (Ex)

An eidolon’s sense of smell becomes quite acute. The eidolon gains the scent special quality, allowing it to detect opponents within 30 feet by sense of smell. If the opponent is upwind, the range increases to 60 feet; if downwind, it drops to 15 feet. Strong scents can be detected at twice the normal range. Scent does not allow the eidolon to precisely locate the creature, only to detect its presence. It can detect the direction with a move action. The eidolon can pinpoint the creature’s location if it is within 5 feet. The eidolon can use scent to track creatures. Source: Advanced Player’s Guide

Skilled (Ex)

An eidolon becomes especially adept at a specific skill, gaining a +8 racial bonus on that skill. This evolution can be selected more than once. Its effects do not stack. Each time an eidolon selects this evolution, it applies to a different skill. Source: Advanced Player’s Guide

Slam (Ex)

An eidolon can deliver a devastating slam attack. This attack is a primary attack. The slam deals 1d8 points of damage (2d6 if Large, 2d8 if Huge). The eidolon must have the limbs (arms) evolution to take this evolution. Alternatively, the eidolon can replace the claws from its base form with this slam attack (this still costs 1 evolution point). This evolution can be selected more than once, but the eidolon must possess an equal number of the limbs evolution. Source: Advanced Player’s Guide

Sting (Ex)

An eidolon possesses a long, barbed stinger at the end of its tail, granting it a sting attack. This attack is a primary attack. The sting deals 1d4 points of damage (1d6 if Large, 1d8 if Huge). The eidolon must possess the tail evolution to take this evolution. This evolution can be selected more than once, but the eidolon must possess an equal number of the tail evolution. Source: Advanced Player’s Guide

Swim (Ex)

An eidolon gains webbed hands, feet, or powerful flippers, giving it a swim speed equal to its base speed. This evolution does not give the eidolon the ability to breathe underwater. This evolution can be selected more than once. Each additional time it is selected, increase the eidolon’s swim speed by 20 feet. Source: Advanced Player’s Guide

Tail (Ex)

An eidolon grows a long, powerful tail. This grants it a +2 racial bonus on Acrobatics checks made to balance on a surface. This evolution can be selected more than once. Source: Advanced Player’s Guide

Tail Slap (Ex)

An eidolon can use its tail to bash nearby foes, granting it a tail slap attack. This attack is a secondary attack. The tail slap deals 1d6 points of damage (1d8 if Large, 2d6 if Huge). The eidolon must possess the tail evolution to take this evolution. This evolution can be selected more than once, but the eidolon must possess an equal number of the tail evolution. Source: Advanced Player’s Guide

Tentacle (Ex)

An eidolon possesses a long, sinuous tentacle, granting it a tentacle attack. This attack is a secondary attack. The tentacle attack deals 1d4 points of damage (1d6 if Large, 1d8 if Huge). This evolution can be selected more than once. Source: Advanced Player’s Guide

Unnatural Aura (Su)

An eidolon is obviously of unnatural origin. Normal animals do not willingly approach the eidolon unless the animal’s master makes a DC 25 Handle Animal, Ride, or wild empathy check. Source: Ultimate Magic

Wing Buffet (Ex)

An eidolon learns to use its wings to batter foes, granting it two wing buffet attacks. These attacks are secondary attacks. The wing buffets deal 1d4 points of damage (1d6 if Large, 1d8 if Huge). The eidolon must possess the flight evolution, with wings, to select this evolution. Source: Advanced Player’s Guide

Limb (Treads): A clockwork eidolon with treads moves at a speed of 20 feet, but is more stable than if it were walking on legs, gaining a +4 bonus to its CMD against trip and bull-rush attempts. A clockwork eidolon with both treads and legs can switch freely between them as a free action. A clockwork eidolon can only have one set of treads. Only a clockwork eidolon can take this evolution.

Shrink: A clockwork eidolon can, as a standard action, shrink, making itself one size smaller. During this time, it cannot make any attacks and is treated as being flat-footed. It may take another standard action to return to its normal size and regain its faculties. Only a clockwork eidolon can take this evolution

Smuggler’s Hold: This evolution gives the clockwork eidolon a hold somewhere on its body, where one can place any items they might see fit to hide. On a small eidolon, this hold is 6”x6”x3”. On a medium eidolon, it is 1’x1’x6”. On a large eidolon it is 2’x2’x1’. And on a huge eidolon it is 4’x4’x2’. By spending 1 extra evolution point, the clockwork eidolon can ignore the weight of objects hidden inside the smuggler’s hold. Spotting a smuggler’s hold on a clockwork eidolon is a DC 20. Only a clockwork eidolon can take this evolution.

2-Point Evolutions

The following evolutions cost 2 points from the eidolon’s evolution pool.

Ability Increase (Ex)

An eidolon grows larger muscles, gains faster ref lexes, achieves greater intelligence, or acquires another increase to one of its abilities. Increase one of the eidolon’s ability scores by +2. This evolution can be selected more than once. It can only be applied once to an individual ability score, plus 1 additional time for every 6 levels the summoner possesses. Source: Advanced Player’s Guide

Alignment Smite (Su)

Source: Champions of Purity

Choose: A single alignment component that opposes one of the summoner’s own.

Benefit: Once per day as a swift action, the eidolon chooses one target within sight. If this target’s alignment matches that chosen for this ability, the eidolon deals an additional +1d6 points of damage with one of its natural weapons. This attack is treated as good-aligned for the purposes of overcoming damage reduction. The alignment smite persists until the target is dead or the eidolon is dismissed. At 10th level, the summoner may spend 1 additional evolution point to allow the eidolon a second daily use of this ability. The summoner must be at least 5th level before selecting this evolution. Evil or true neutral summoners cannot select this evolution.

Channel Resistance (Ex)

An eidolon becomes less easily affected by the channel energy ability of clerics or paladins. The eidolon gains a +2 bonus on any saves that are made to resist the effects of channel energy, including effects that rely on the use of channel energy (such as the Command Undead feat). At 7th level, this bonus can be increased to +4 by spending 2 additional evolution points. The eidolon must possess the undead appearance evolution to take this evolution. Source: Ultimate Magic

Constrict (Ex)

An eidolon gains powerful muscles that allow it to crush those it grapples. Whenever the eidolon successfully grapples a foe using the grab evolution, it deals additional damage equal to the amount of damage dealt by the attack used by the grab evolution. This evolution is only available to eidolons of the serpentine base form. Source: Advanced Player’s Guide

Energy Attacks (Su)

An eidolon’s attacks become charged with energy.

Pick one energy type: acid, cold, electricity, or fire. All of the eidolon’s natural attacks deal 1d6 points of energy damage of the chosen type on a successful hit. The summoner must be at least 5th level before selecting this evolution. Source: Advanced Player’s Guide

Flight (Ex or Su)

An eidolon grows large wings, like those of a bat, bird, insect, or dragon, gaining the ability to fly. The eidolon gains a fly speed equal to its base speed. The eidolon’s maneuverability depends on it size. Medium or smaller eidolons have good maneuverability. Large eidolons have average maneuverability, while Huge eidolons have poor maneuverability. For 2 additional evolution points, the eidolon flies by means of magic. It loses its wings, but its maneuverability increases to perfect. Flying via magic means makes this a supernatural ability. The eidolon’s fly speed can be increased by spending additional evolution points, gaining a 20-foot increase to fly speed for each additional point spent. The summoner must be at least 5th level before selecting this evolution. Source: Advanced Player’s Guide

Gore (Ex)

An eidolon grows a number of horns on its head, giving it a gore attack. This attack is a primary attack. The gore deals 1d6 points of damage (1d8 if Large, 2d6 if Huge). Source: Advanced Player’s Guide

Grab (Ex)

An eidolon becomes adept at grappling foes, gaining the grab ability. Pick bite, claw, pincers, slam, tail slap, or tentacle attacks. Whenever the eidolon makes a successful attack of the selected type, it can attempt a free combat maneuver check. If successful, the eidolon grapples the target. This ability only works on creatures of a size one category smaller than the eidolon or smaller. Eidolons with this evolution receive a +4 bonus on CMB checks made to grapple. Source: Advanced Player’s Guide

Head (Ex)

An eidolon grows an additional head. The eidolon does not gain any additional natural attacks for the additional head, but the additional head does allow the eidolon to take other evolutions that add an additional attack to a head (such as a bite, gore, or breath weapon). This evolution can be selected more than once. Source: Ultimate Magic

Immunity (Su)

An eidolon’s body becomes extremely resilient to one energy type, gaining immunity to that type. Pick one energy type: acid, cold, electricity, fire, or sonic. The eidolon gains immunity to that energy type. This evolution can be selected more than once. Its effects do not stack. Each time it applies to a different energy type. The summoner must be at least 7th level before selecting this evolution. Source: Advanced Player’s Guide

Keen Scent (Ex)

An eidolon’s sense of smell becomes even more acute. The eidolon can notice other creatures by scent in a 180-foot radius underwater and can detect blood in the water at ranges of up to a mile. The eidolon must possess the gills and scent evolutions to take this evolution. Source: Ultimate Magic

Limbs (Ex)

An eidolon grows an additional pair of limbs. These limbs can take one of two forms. They can be made into legs, complete with feet. Each pair of legs increases the eidolon’s base speed by 10 feet. Alternatively, they can be made into arms, complete with hands. The eidolon does not gain any additional natural attacks for an additional pair of arms, but it can take other evolutions that add additional attacks (such as claws or a slam). Arms that have hands can be used to wield weapons, if the eidolon is proficient. This evolution can be selected more than once. Source: Advanced Player’s Guide

Minor Magic (Sp)

An eidolon learns to cast a minor spell as a spell-like ability. Select one spell from the following list: burning hands, comprehend languages, cure light wounds, detect chaos/evil/good/law, magic missile, obscuring mist, silent image, vanish [APG] (self only), or ventriloquism. This spell can be cast once per day as a spell-like ability. At 7th level, this spell can be cast three times per day by spending 2 additional evolution points. The caster level for this evolution is equal to the eidolon’s Hit Dice – 2. The save DC for this spell is 10 + 1/2 the eidolon’s HD + the eidolon’s Charisma modifier. The eidolon must have a Charisma score of at least 11 and must possess the basic magic evolution to take this evolution.

The summoner must be at least 4th level before selecting this evolution. This evolution can be selected more than once. Each time an eidolon selects this evolution, it applies to a new spell from the above list. Source: Ultimate Magic

Poison (Ex)

An eidolon secretes toxic venom, gaining a poison attack. Pick one bite or sting attack. Whenever the selected attack hits, the target is poisoned.

Eidolon poison—type poison (injury); save Fort negates; frequency 1/round for 4 rounds; effect 1d4 Str damage; cure 1 save.

The save DC is equal to 10 + 1/2 the eidolon’s HD + the eidolon’s Constitution modifier.

For 2 additional evolution points, this poison deals Constitution damage instead. This poison can be used no more than once per round. The summoner must be at least 7th level before selecting this evolution. Source: Advanced Player’s Guide

Rake (Ex)

An eidolon grows dangerous claws on its feet, allowing it to make 2 rake attacks on foes it is grappling. These attacks are primary attacks. The eidolon receives these additional attacks each time it succeeds on a grapple check against the target. These rake attacks deal 1d4 points of damage (1d6 if Large, 1d8 if Huge). This evolution is only available to eidolons of the quadruped base form. This evolution counts as one natural attack toward the eidolon’s maximum. The summoner must be at least 4th level before selecting this evolution. Source: Advanced Player’s Guide

Rend (Ex)

An eidolon learns to rip and tear the flesh of those it attacks with its claws, gaining the rend ability. Whenever the eidolon makes two successful claw attacks against the same target in 1 round, its claws latch onto the flesh and deal extra damage. This damage is equal to the damage dealt by one claw attack plus 1-1/2 times the eidolon’s Strength modifier. The eidolon must possess the claws evolution to select this evolution. The summoner must be at least 6th level before selecting this evolution. Source: Advanced Player’s Guide

*Editor’s Note
Shadow blend and shadow form are from the Advanced Race Guide, and though they are more common among fetchling summoners, they are available to any summoner.

Shadow Blend (Su)*

In any condition of illumination other than bright light, the eidolon disappears into the shadows, giving it concealment (20% miss chance). If it has the shadow form evolution, it instead gains total concealment (50% miss chance). The eidolon can suspend or resume this ability as a free action. Source: Advanced Race Guide

Shadow Form (Su)*

The eidolon’s body becomes shadowy and more indistinct. This shadow form grants the eidolon constant concealment (20% miss chance), and its melee attacks affect incorporeal creatures as if it had the ghost touch weapon property. The eidolon’s melee attacks deal only half damage to corporeal creatures. Source: Advanced Race Guide

Trample (Ex)

An eidolon gains the ability to crush its foes underfoot, gaining the trample ability. As a full-round action, the eidolon can overrun any creature that is at least one size smaller than itself. This works like the overrun combat maneuver, but the eidolon does not need to make a check, it merely has to move over opponents in its path. The creatures take 1d6 points of damage (1d8 if Large, 2d6 if Huge), plus 1-1/2 times the eidolon’s Strength modifier. Targets of the trample can make attacks of opportunity at a –4 penalty. If a target forgoes the attack of opportunity, it can make a Reflex save for half damage. The DC of this save is 10 + 1/2 the eidolon’s HD + the eidolon’s Strength modifier. A trampling eidolon can only deal trampling damage to a creature once per round. This evolution is only available to eidolons of the biped or quadruped base forms. Source: Advanced Player’s Guide

Tremorsense (Ex)

An eidolon becomes attuned to vibrations in the ground, gaining tremorsense out to a range of 30 feet. This works like the blindsense evolution, but only if both the eidolon and the creature to be pinpointed are in contact with the ground. The summoner must be at least 7th level before selecting this evolution. Source: Advanced Player’s Guide

Trip (Ex)

An eidolon becomes adept at knocking foes to the ground with its bite, granting it a trip attack. Whenever the eidolon makes a successful bite attack of the selected type, it can attempt a free combat maneuver check. If successful, the target is knocked prone. If the check fails, the eidolon is not tripped in return. This ability only works on creatures of a size equal to or smaller than the eidolon. The eidolon must possess the bite evolution to select this evolution. Source: Advanced Player’s Guide

Undead Appearance (Ex)

An eidolon appears as an undead creature, and mimics some of an undead creature’s abilities and weaknesses. Negative energy heals the eidolon, and positive energy (including a cleric’s channel energy ability) harms it. Spells and effects that target undead or have specific effects against undead (such as Command Undead, hold (halt?) undead, and searing light) affect the eidolon as if it were undead. The eidolon gains a +2 bonus on saves against disease, exhaustion, fatigue, paralysis, poison, sleep effects, and stunning.

At 7th level, this bonus on saves can be increased to +4 by spending 2 additional evolution points. At 12th level, this protection can be increased to immunity against these attacks by spending 2 additional evolution points (the summoner must pay for the 7th-level upgrade before paying for this 12th-level upgrade).

Although the eidolon appears undead, it is still an outsider. Source: Ultimate Magic

Weapon Training (Ex)

An eidolon learns to use a weapon, gaining Simple Weapon Proficiency as a bonus feat. If 2 additional evolution points are spent, it gains proficiency with all martial weapons as well. Source: Advanced Player’s Guide

Limb (wheels): This evolution adds two wheels to a clockwork eidolon. A clockwork eidolon with wheels moves at a speed of 30 feet and, moving downhill, gains +10 feet to its land speed. Taking this evolution twice grants the eidolon a +4 bonus on its CMD against trip and bull-rush attempts. Only a clockwork eidolon can take this evolution.

Medium Size: This evolution increases the clockwork eidolon’s size from small to medium. It gains +2 strength, -2 dexterity, and is treated as a medium creature. Only a clockwork minion can take this evolution.

Magnetism: This evolution allows a clockwork eidolon to climb more easily on metallic surfaces. The eidolon can climb on metallic surfaces as if using the spider climb spell. Only a clockwork eidolon can take this evolution. The mechanist must be at least 5th level to select this evolution.

3-Point Evolutions

The following evolutions cost 3 points from the eidolon’s evolution pool.

Blindsense (Ex)

An eidolon’s senses become incredibly acute, giving it blindsense out to a range of 30 feet. This ability allows the eidolon to pinpoint the location of creatures that it cannot see without having to make a Perception check, but such creatures still have total concealment from the eidolon. Visibility still affects the eidolon’s movement and it is still denied its Dexterity bonus to Armor Class against attacks from creatures it cannot see. The summoner must be at least 9th level before selecting this evolution. Source: Advanced Player’s Guide

Burrow (Ex)

An eidolon grows thick and gnarled claws, allowing it to move through the earth. The eidolon gains a burrow speed equal to 1/2 its base speed. It can use this speed to move through dirt, clay, sand, and earth. It does not leave a hole behind, nor is its passage marked on the surface. The summoner must be at least 9th level before selecting this evolution. Source: Advanced Player’s Guide

Celestial Appearance (Ex)

Source: Champions of Purity

The eidolon appears as a celestial creature and manifests some of the abilities of a celestial.

Prerequisite: Must be of good alignment

Benefit: Spells and effects that target creatures with the good subtype or have specific effects against such creatures affect the eidolon as if it were a celestial. The eidolon gains a +2 bonus on saves against disease, petrification, poison, and electricity spells and effects. It also gains spell resistance equal to 5 + its HD against spells with the evil descriptor.

At 7th level, by spending 2 additional evolution points, this bonus on saves is increased to +4 and the spell resistance is extended to affect any spells and effects from evil creatures.

At 12th level, by spending 2 additional evolution points, this protection is increased to immunity against these attacks and the spell resistance is increased to 11 + its HD (the summoner must pay for the 7th-level upgrade before paying for this 12th-level upgrade).

Damage Reduction (Su)

An eidolon’s body becomes resistant to harm, granting it damage reduction.

Choose: one alignment: chaotic, evil, good, or lawful.

Benefit: The eidolon gains DR 5 that can be bypassed by weapons that possess the chosen alignment. The alignment must be opposite to one of the alignments possessed by the eidolon. At 12th level, this protection can be increased to DR 10 by spending 2 additional evolution points. The summoner must be at least 9th level before selecting this evolution. Source: Advanced Player’s Guide

Frightful Presence (Ex)

An eidolon becomes unsettling to its foes, gaining the frightful presence ability. The eidolon can activate this ability as part of an offensive action, such as a charge or attack. Opponents within 30 feet of the eidolon must make a Will save or become shaken for 3d6 rounds. The DC of this save is equal to 10 + 1/2 the eidolon’s HD + the eidolon’s Charisma modifier. If the eidolon has at least 4 more Hit Dice than an opponent, that opponent becomes frightened instead. Foes with more HD than the eidolon are immune to this effect. The summoner must be at least 11th level before selecting this evolution. Source: Advanced Player’s Guide

Major Magic (Sp)

An eidolon learns to cast a major spell as a spell-like ability. Select one spell from the following list: acid arrow, cure moderate wounds, darkness, daze monster, glide [APG], invisibility (self only), lesser restoration, levitate, minor image, scorching ray, see invisibility, or spider climb. This spell can be cast once per day as a spell-like ability.

At 10th level, this spell can be cast three times per day by spending 2 additional evolution points. The caster level for this evolution is equal to the eidolon’s Hit Dice – 2. The save DC for this spell is 10 + 1/2 the eidolon’s HD + the eidolon’s Charisma modifier. The eidolon must have a Charisma score of at least 12 and must possess the minor magic evolution to take this evolution. The summoner must be at least 7th level before selecting this evolution. This evolution can be selected more than once. Each time an eidolon selects this evolution, it applies to a new spell from the above list. Source: Ultimate Magic

Sacrifice (Su)

Source: Champions of Purity

An eidolon can sacrifice its own health to heal another creature.

As a standard action, the eidolon can sacrifice up to 2 hit points per Hit Die and then touch the target creature, thereby healing the creature for half the amount sacrificed.

See in Darkness (Su)

An eidolon can see perfectly in darkness of any kind, including that created by deeper darkness. The summoner must be at least 9th level before selecting this evolution. Source: Ultimate Magic

Swallow Whole (Ex)

An eidolon gains the swallow whole ability, giving it the ability to consume its foes. If the eidolon begins its turn with a creature grappled using its bite attack (see the grab evolution), it can attempt a combat maneuver check to swallow the creature. The creature can be up to one size category smaller than the eidolon. Swallowed creatures take damage equal to the eidolon’s bite damage each round plus 1d6 points of bludgeoning damage. A swallowed creature keeps the grappled condition, but can attempt to cut its way free with a light slashing or piercing weapon. The amount of damage needed to cut free is equal to 1/10 the eidolon’s total hit points. The eidolon’s AC against these attacks is equal to 10 + 1/2 its natural armor bonus. If a swallowed creature cuts its way out, the eidolon loses this ability until it heals this damage. Alternatively, the swallowed creature can attempt to escape the grapple as normal. Success indicates that it has returned to the eidolon’s mouth, where it can attempt to escape or be swallowed again. The eidolon must possess the grab evolution, tied to a bite attack, to take this evolution. The summoner must be at least 9th level before selecting this evolution. Source: Advanced Player’s Guide

Web (Ex)

An eidolon gains a pair of spinnerets, giving it the ability to spin webs. The eidolon can use these webs to support itself plus up to one creature of the same size. It can throw webbing as a ranged touch attack up to 8 times per day, entangling a creature up to one size larger than the eidolon. The webbing has a range of 50 feet and a 10-foot range increment. Creatures entangled by the web can escape with an Escape Artist check or a Strength check (at a –4 penalty). The DC of these checks is equal to 10 + 1/2 the eidolon’s HD + the eidolon’s Con modifier. The webs have a Hardness of 0 and a number of hits points equal to the eidolon’s total Hit Dice. The eidolon can climb its own webs at its climb speed and can pinpoint any creature touching its webs. The eidolon must possess the climb evolution to take this evolution. The summoner must be at least 7th level before selecting this evolution. Source: Advanced Player’s Guide

Combine: A clockwork minion with this evolution can combine with a mechanist’s Clockwork Eidolon, granting it an extra evolution. The clockwork minion must be at least one size smaller than the clockwork eidolon to use this ability. As a standard action, the clockwork minion combines with the eidolon, granting it access to one of the minion’s 1-point evolutions. The size of the evolution is equivalent to the eidolon’s size, not the minion’s size (example: a small minion combining with a medium eidolon, granting it claws, the claws would deal damage as a medium creature, not small). Any granted evolutions based on HD are based on the HD of the minion. If the eidolon does not have the prerequisite evolution to use a granted evolution, he cannot use it (example: a serpentine eidolon with no arms cannot use the claws evolution granted by a minion.) By spending 1 extra point, the minion can grant a 2-point evolution. By spending 2 extra points, it can grant a 3-point evolution. By spending 3 extra points, it can grant a 4-point evolution. By spending another extra point, the minion can grant one more 1-point evolution (this second evolution can be enhanced as well by spending the appropriate amount of evolution points). This evolution can only be applied to a clockwork minion. The mechanist must be at least 5th level to select this evolution.

4-Point Evolutions

The following evolutions cost 4 points from the eidolon’s evolution pool.

Blindsight (Ex)

An eidolon’s senses sharpen even further, granting it blindsight out to a range of 30 feet. The eidolon can maneuver and attack as normal, ignoring darkness, invisibility, and most forms of concealment as long as it has line of effect to the target. The eidolon must possess the blindsense evolution to take this evolution. The summoner must be at least 11th level before selecting this evolution. Source: Advanced Player’s Guide

Breath Weapon (Su)

An eidolon learns to exhale a cone or line of magical energy, gaining a breath weapon. Select either acid, cold, electricity, or fire. The eidolon can breathe a 30-foot cone (or 60-foot line) that deals 1d6 points of damage of the selected type per HD it possesses. Those caught in the breath weapon can attempt a Reflex save for half damage. The DC is equal to 10 + 1/2 the eidolon’s HD + the eidolon’s Constitution modifier. The eidolon can use this ability once per day. The eidolon can use this ability 1 additional time per day by spending an additional 1 evolution point (maximum 3/day). The summoner must be at least 9th level before selecting this evolution. Source: Advanced Player’s Guide

Dimension Door (Sp)

An eidolon learns to cast dimension door as a spell-like ability once per day. The caster level for this evolution is equal to the eidolon’s Hit Dice. The save DC for this spell is 10 + 1/2 the eidolon’s HD + the eidolon’s Charisma modifier. The eidolon must have a Charisma score of at least 14 to take this evolution. The summoner must be at least 13th level before selecting this evolution. Source: Ultimate Magic

Fast Healing (Su)

An eidolon’s body gains the ability to heal wounds very quickly, giving it fast healing 1. The eidolon heals 1 point of damage each round, just like natural healing. Fast healing does not restore hit points lost due to starvation, thirst, or suffocation, nor does it allow the eidolon to regrow lost body parts (or to reattach severed parts). Fast healing functions as long as the eidolon is alive. This fast healing does not function when the eidolon is not on the same plane as its summoner. This healing can be increased by 1 per round for every 2 additional evolution points spent (maximum 5). The summoner must be at least 11th level before selecting this evolution. Source: Advanced Player’s Guide

Incorporeal Form (Sp)

Once per day, an eidolon can become incorporeal for 1 round per summoner level. While in this form, the eidolon gains the incorporeal subtype and incorporeal quality. It only takes half damage from corporeal sources as long as they are magic (it takes no damage from nonmagical weapons and objects). Likewise, its spells or spell-like abilities deal only half damage to corporeal creatures. Spells and other effects that do not deal damage function normally. The summoner must be at least 15th level before selecting this evolution. Source: Ultimate Magic

Large (Ex)

An eidolon grows in size, becoming Large. The eidolon gains a +8 bonus to Strength, a +4 bonus to Constitution, and a +2 bonus to its natural armor. It takes a –2 penalty to its Dexterity. This size change also gives the creature a –1 size penalty to its AC and on attack rolls, a +1 bonus to its CMB and CMD, a –2 penalty on Fly skill checks, and a –4 penalty on Stealth skill checks. If the eidolon has the biped base form, it also gains 10-foot reach. Any reach evolutions the eidolon possesses are added to this total. The eidolon must be Medium to take this evolution. The summoner must be at least 8th level before selecting this evolution.

If 6 additional evolution points are spent, the eidolon instead becomes Huge. The eidolon gains a +16 bonus to Strength, a +8 bonus to Constitution, and a +5 bonus to its natural armor. It takes a –4 penalty to its Dexterity. This size change also give the creature a –2 size penalty to its AC and attack rolls, a +2 bonus to its CMB and CMD, 10-foot reach, a –4 penalty on Fly skill checks, and a –8 penalty on Stealth skill checks. If the eidolon has the biped base form, its reach increases to 15 feet (10 feet for all other base forms). Any reach evolutions the eidolon possesses are added to this total. These bonuses and penalties replace, and do not stack with, those gained from becoming Large. The summoner must be at least 13th level before selecting this option.

The ability increase evolution costs twice as much (4 evolution points) when adding to the Strength or Constitution scores of a Large or Huge eidolon. Source: Advanced Player’s Guide

Lifesense (Su)

An eidolon can pinpoint living creatures with ease. The eidolon notices and locates living creatures within 60 feet, just as if it possessed the blindsight evolution. The eidolon must possess the undead appearance evolution to take this evolution. The summoner must be at least 11th level before selecting this evolution. Source: Ultimate Magic

No Breath (Ex)

An eidolon no longer needs to breathe. The eidolon does not breathe, and is immune to effects that require breathing (such as inhaled poison). This does not give immunity to cloud or gas attacks that do not require breathing. The summoner must be at least 11th level before selecting this evolution. Source: Ultimate Magic

Spell Resistance (Ex)

An eidolon is protected against magic, gaining spell resistance. The eidolon’s spell resistance is equal to 11 + the summoner’s level. This spell resistance does not apply to spells cast by the summoner. The summoner must be at least 9th level before selecting this evolution. Source: Advanced Player’s Guide

Ultimate Magic (Sp)

An eidolon learns to cast a powerful spell as a spell-like ability. Select one spell from the following list: arcane sight, create food and water, cure serious wounds, daylight, fireball, fly, gaseous form, lightning bolt, major image, stinking cloud, tongues, or water breathing. This spell can be cast once per day as a spell-like ability. The caster level for this evolution is equal to the eidolon’s Hit Dice – 2. The save DC for this spell is 10 + 1/2 the eidolon’s HD + the eidolon’s Charisma modifier. The eidolon must have a Charisma score of at least 13 and must possess the major magic evolution to take this evolution.

The summoner must be at least 11th level before selecting this evolution. This evolution can be selected more than once. Each time an eidolon selects this evolution, it applies to a new spell from the above list. Source: Ultimate Magic

Upgrades

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