The summoner is a complex and unusual class. Its most prominent class feature is the eidolon, a customizable monster that "always appears as some sort of fantastical creature." What kind of fantastical creature this is remains up to the player. Fortunately, mythology and the Pathfinder Roleplaying Game have many examples of fantastical creatures that an eidolon might resemble, from fish-people to angels, and from spider-centaurs to undead monsters.
This section features a new aquatic eidolon base form, allowing players to more quickly design water-themed eidolons. To make building eidolons easier, this section also presents eidolon "models"—a pre-set base form and list of evolutions to make an eidolon resemble a specific kind of creature. Finally, this section describes four new summoner archetypes
Aquatic Base Form
A fourth base form, aquatic, is available to eidolons in addition to the biped, quadruped, and serpentine base forms. The aquatic base form follows all of the normal rules for base forms and can select the mount evolution.
Aquatic
Starting Statistics
Size Medium; Speed 20 ft., swim 40 ft.; AC +4 natural armor; Saves Fort (good), Ref (good), Will (bad); Attack bite (1d6); Ability Scores Str 16, Dex 12, Con 13, Int 7, Wis 10, Cha 11; Free Evolutions bite, improved natural armor, gills, swim (2).
Eidolon Models
An eidolon can look like almost anything its summoner desires. Eidolon models are pre-built examples of base forms and evolutions that provide an easy guide to building an eidolon with a specific appearance or theme.
Using a model does not change the eidolon's type or give it special abilities unavailable to other eidolons—it is basically a shortcut to allow a player or GM to quickly create an eidolon with a specific look in mind. Each model states the total number of evolution points required to build a complete eidolon with that model; in many cases this build requires most of the summoner's evolution points, so only a more powerful summoner's eidolon is a close approximation of the intended creature. For a low-level summoner, some of the eidolon's features (such as extra hydra heads) may be cosmetic until he gains evolution points to spend.
The Base Form lists the eidolon's recommended base form for that model. Primary Evolutions are a list of recommended evolutions to choose when you start building an eidolon with that model. Additional Evolutions are a list of other evolutions to complete the modeled eidolon's form and abilities.
The eidolon looks like an aberrant aquatic creature such as an aboleth.
25 points
: Base Form aquatic; Primary Evolutions reach (tentacles), tentacles (2); Secondary Evolutions basic magic (ghost sound), huge, large, major magic (minor image), minor magic (silent image), tentacles (2), ultimate magic (major image).
Angel
The eidolon looks like a celestial being such as an angel, archon, or azata. Angel eidolons usually appear as beautiful humanoids with large, feathered wings.
24 points
: Base Form biped; Primary Evolutions resistance (fire or electricity), weapon training; Secondary Evolutions basic magic (stabilize), damage reduction (evil), flight, immunity (acid or cold), major magic (cure moderate wounds or invisibility), minor magic (cure light wounds or detect evil), spell resistance, ultimate magic (cure serious wounds, daylight, or tongues) or dimension door.
This model creates a multi-legged, reptilian eidolon that looks like a behir.
24 points
Base Form quadruped; Primary Evolutions climb, limbs (legs); Secondary Evolutions breath weapon (electricity), grab (bite), immunity (electricity), large, limbs (legs, 3), swallow whole.
The eidolon looks like a humanoid warrior. The natural armor of a bodyguard eidolon appears to be a suit of metal plate, though this armor is actually part of the eidolon's body. Bodyguard eidolons are normally trained in a variety of dangerous weapons.
11 points
Base Form biped; Primary Evolutions improved natural armor, weapon training; Secondary Evolutions ability increase (Strength), fast healing, weapon training (martial).
The eidolon has the upper torso of a humanoid and the lower body of a quadruped (such as a horse). A centaur eidolon's upper humanoid torso is smaller than its quadrupedal body. As a result, it wields weapons as if it were one size category smaller than its actual size (Medium for most centaur eidolons). The centaur model can also be used to create a lamia (a centaur eidolon with the upper body of a woman and the lower body of a lion) by replacing the hooves evolution with claws and taking basic magic (touch of fatigue), minor magic (ventriloquism), major magic (daze monster), and ultimate magic (major image), resulting in a 23-point model.
13 points
Base Form quadruped; Primary Evolutions limbs (arms), hooves; Secondary Evolutions large, trample, weapon training, weapon training (martial).
The eidolon looks like chimera—a lion with wings and two additional heads, those of a dragon and a goat. The color of the dragon's head determines the chimera eidolon's breath weapon type.
19 points
Base Form quadruped; Primary Evolutions claws, head; Secondary Evolutions bite, breath weapon, flight, gore, head, large, scent.
Demon
The eidolon has a demonic appearance. Demon eidolons have no recommended base form, as demons can have almost any form. A marilith demon eidolon might have the serpentine base form, while a vrock demon eidolon would have the biped base form.
26 points
Base Form any; Primary Evolutions resistance (acid, cold, fire); Secondary Evolutions basic magic (acid splash); bite, claws, slam, or tentacle; damage reduction (good); flight; immunity (electricity); magic attacks; major magic (darkness or see invisibility); minor magic (detect good or vanish); spell resistance; ultimate magic (gaseous form or stinking cloud) or dimension door.
Devil
The eidolon has an infernal appearance. Devil eidolons might have large bat wings or could fly magically.
26 points
Base Form biped; Primary Evolutions basic magic (daze or ray of frost), magic attacks, resistance (acid or cold); Secondary Evolutions damage reduction (good), flight, immunity (fire), major magic (invisibility, minor image, or scorching ray), minor magic (burning hands or detect good), see in darkness, spell resistance, ultimate magic (fireball, lightning bolt, or major image) or dimension door.
Dragon
The eidolon appears to be a Medium dragon. Making a Small dragon eidolon creates a fairy dragon or pseudodragon. Large or Huge dragons can be created by exchanging one or more of the evolutions below for the large evolution.
26 points
Base Form quadruped; Primary Evolutions claws, tail, tail slap; Secondary Evolutions basic magic (any), blindsense, breath weapon, flight, frightful presence, immunity, magic attacks, minor magic (any), spell resistance, wing buffet.
This centaurlike eidolon has the upper torso of a humanoid and the lower body of a giant spider. A drider eidolon's upper humanoid torso is smaller than its spider body. As a result, it wields weapons as if it were one size category smaller than its actual size (Medium for most drider eidolons).
25 points
Base Form quadruped; Primary Evolutions climb, limbs (arms); Secondary Evolutions basic magic (dancing lights or detect magic), large, limbs (legs, 2), minor magic (detect good or detect law), poison, spell resistance, weapon training, web.
Fey
The eidolon looks like a fey creature such as a dryad, nymph, pixie, or satyr. Fey eidolons usually appear as attractive humanoids and may have insect or butterfly wings. An aquatic fey such as a nixie can be created by adding the gills and swim evolutions, resulting in a 24-point model.
22 points
: Base Form biped; Primary Evolutions basic magic (daze, dancing lights, detect magic, or ghost sound), weapon training; Secondary Evolutions damage reduction (lawful), dimension door, flight, low-light vision, major magic (cure moderate wounds or invisibility), minor magic (obscuring mist or vanish), spell resistance.
Genie
The eidolon looks like a genie such as a djinni, efreeti, janni, marid, or shaitan. The eidolon's movement, energy attacks, and immunity depend on what type of genie is created—a djinni has flight, electricity attacks, and immunity to acid; an efreeti has flight, fire attacks, and immunity to fire; a marid has swim, cold attacks, and immunity to cold; and a shaitan has burrow, acid attacks, and immunity to electricity.
21-23 points
Base Form biped; Primary Evolutions basic magic (detect magic), weapon training; Secondary Evolutions burrow, flight, or swim; energy attacks; immunity; large; major magic (acid arrow, invisibility, or scorching ray); minor magic (burning hands or obscuring mist); ultimate magic (create food and water, gaseous form, or water breathing).
The eidolon looks like a multi-headed hydra. This model creates a five-headed hydra. A cryohydra or pyrohydra can be created by adding the breath weapon and immunity evolutions, resulting in a 26-point model.
20 points
Base Form serpentine; Primary Evolutions bite, head; Secondary Evolutions bite (3), fast healing, head (3), large.
Linnorm
The eidolon appears to be a Medium-sized linnorm. Large or Huge linnorms can be created by exchanging one or more of the evolutions below for the large evolution. This model can also be used to create a wingless dragon such as a Chinese dragon.
23 points
Base Form serpentine; Primary Evolutions claws, limbs (legs); Secondary Evolutions breath weapon, fast healing, flight, flight (magic), immunity, poison, spell resistance.
Mammoth
The eidolon is a large, powerful creature with tusks and a prehensile trunk (using the tentacle evolution), such as an elephant or mastodon.
14 points
(20 points for Huge): Base Form quadruped; Primary Evolutions gore, tentacle; Secondary Evolutions grab (tentacle), huge, large, mount, scent, slam, trample.
The eidolon has the upper body of a humanoid and the lower body of a fish. This model can be used to create an aquatic humanoid such as a merfolk or sahuagin.
18 points
Base Form aquatic; Primary Evolutions limbs (arms), tail; Secondary Evolutions blindsense, claws or pincers, immunity (cold), no breath, tail slap, weapon training, weapon training (martial).
The eidolon is a fiery equine similar to a nightmare, possibly suitable for use as a mount.
17 points
Base Form quadruped; Primary Evolutions energy attacks (fire), hooves; Secondary Evolutions flight (magic), large, minor magic (obscuring mist), mount, resistance (fire), trample.
Sea Serpent
This serpentine, aquatic eidolon looks like a sea serpent or aquatic worm.
18 points
, 24 points (Huge): Base Form serpentine; Primary Evolutions gills, resist (fire), swim; Secondary Evolutions constrict, grab (bite and tail slap), immunity (cold), large, swallow whole.
The eidolon looks like a sleek aquatic predator such as a shark or orca.
16 points
Base Form aquatic; Primary Evolutions grab (bite), scent; Secondary Evolutions blindsense, improved damage (bite), keen scent, large, swallow whole.
Thing from Beyond
The eidolon has a form that was not meant to be seen by mortal eyes, such as that of a shoggoth, mi-go, star-spawn, or something even worse. The Thing from Beyond can have any base form, with multiple mouths, eyes, claws, and tentacles.
25 points
Base Form any; Primary Evolutions tentacles (3); Secondary Evolutions blindsense, bite, grab (bite or tentacle) immunity (cold, sonic), large, resist (acid, electricity, fire), swallow whole, tremorsense.
Undead
The eidolon appears to be an undead creature, whether a skeleton, zombie, mummy, or even an incorporeal ghost or shadow. A summoner with an undead eidolon must select the undead appearance evolution at 1st level.
19 points
Base Form any; Primary Evolutions undead appearance, unnatural aura; Secondary Evolutions channel resistance, immunity (cold), incorporeal form, lifesense, no breath.
Vermin
The eidolon looks like a large insect or other vermin. Taking the limbs (legs) evolution an additional time creates a giant spider.
16 points
, 18 points (spider), 22 or 24 points (Huge): Base Form quadruped; Primary Evolutions climb, limbs (legs); Secondary Evolutions flight, poison, sting, tail, trample, tremorsense, web.
Winged Snake
The eidolon looks like a serpent with wings, such as a couatl or lillend.
Evolutions
The following new evolutions can be taken by any eidolon that meets the prerequisites.