Eidolons are the physical manifestation of spirits based on a conceptual idea tied to the master that controls it. These concepts can be anything from the idea of nature’s wrath to the dread that a soldier experiences watching crows eat the dead on a battlefield. In practice these companions are magical beings who possess supernatural abilities and whose physical form is molded by the desires of their master. If an Eidolon would be injured to the point that they would gain a Mortal Wound, they immediately disappear and cannot be summoned again until you complete a Long Rest. Additionally, they can be willingly dismissed if you spend a Basic Action, and summoned back by spending 10 minutes.
Evolutions
Eidolons are molded to your needs through the use of Evolutions. They have a number of Evolution Points equal to your Spirit modifier + their Highest Rank Bonus. Once chosen these Evolutions may only be changed when a new Evolution is acquired. Individual Evolutions can be purchased multiple times unless otherwise noted.
1-point evolutions
Basic Resistance
The eidolon gains Resistance in a tier 1 energy type equal to your Spirit modifier multiplied by half of your Highest Rank Bonus.
Extra Limb
The eidolon gain an extra set of limbs such as a pair of arms, legs, a tail, wings, head, etc.
Gills
The eidolon can breathe in water.
Infused Attacks
The eidolon gains 1d6 damage of a tier 1 damage type of your choice on all attacks they make. Each additional time this evolution is taken increase this damage by 2 steps on the damage track or increase the tier of energy type available by 1.
Innate Maneuver
Choose a single Maneuver and a single natural attack your Eidolon possesses. Whenever they hit with that natural attack they may attempt a Maneuver check of the chosen type at Advantage against their target, for free.
Magic Attacks
The eidolon chooses a single natural attack they possess, treating that attack as magical for the purposes of bypassing DR and giving them a +1 on attack rolls. This can be taken multiple times, choosing a different natural attack each time.
Maneuvering Attack
The eidolon can make a Grapple check against any target they hit with a natural attack to move the target 5ft in a direction of their choice.
Mount
The eidolon becomes conditioned to be a mount for you, increasing their Overland Travel speed by an amount equal to your Spirit modifier.
Movement Enhancement
The eidolon either gains a 20ft swim, burrow, climb, or (poor) fly speed. They may instead increase and existing movement speed by 10ft.
Natural Weapon
The eidolon gains a natural attack of their choice as secondary natural attack.
Rend
The eidolon may make one additional attack for free against a target they hit with both weapons if they are paired weapons, such as Claws.
Vision Enhancement
The eidolon gains either Scent, Low-Light Vision, or Darkvision 60ft.
2-point evolutions
Alter Size
The eidolon shifts their Size Category by 1 step. Each time this Evolution is taken its cost increases by 1.
Amorphous Body
The eidolon gains 5 percent multiplied by your Spirit modifier Fortification each time this is taken, up to a maximum of 75 percent.
Animalistic Evolution
The eidolon gains a basic Animal Ability from the Animal Companion list.
Breath Weapon
The eidolon gains either a 30ft cone, or 60ft line breath attack, which deals a number of d6s points of damage equal to your Spirit modifier of a chosen tier 1 damage type. Targets caught in the breath weapon make a Body Save for half damage with a Body Save, DC 10 + half of your Highest Rank Bonus + their Constitution modifier. This breath weapon may be used a number of times per Long Rest equal to their Constitution modifier. If taken a second time the breath weapon instead has a cool down of 1d4 rounds or may be of an damage type 1 tier higher.
Dense Hide
The eidolon increases the amount of DR received for each point of Natural Armor by 0.5.
Enhanced Attribute
The eidolon increases a single attribute by 2. Each time this evolution is taken its cost increases by 1 if purchased for the same Attribute again.
Enhanced CMD
The eidolon gains a bonus to CMD equal to your Spirit modifier. This evolution can only be taken once.
Enhanced Saves
The eidolon chooses a single Save type, gaining a bonus to those Saves equal to your Spirit modifier. This evolution applies to a different Save type each time it is taken.
Greater Resistance
The eidolon gains Resistance in a tier 2 damage type equal to your Spirit modifier multiplied by half of your Highest Rank Bonus.
Greater Vision
The eidolon gains either 30ft Tremorsense, Blindsense, Lifesense, or Infravision.
Hardened Hide
The eidolon gains an additional amount of Natural Armor equal to your Spiritmodifier. This evolution can only be taken once.
Multi Attack
The eidolon chooses a secondary natural attack it possesses, that attack no longer takes Iterative penalties when used as part of the All-Out Attack action after their primary natural attack.
Venomous Attack
The eidolon chooses one natural attack they possess, applying a natural venom whenever they hit with the attack. This venom has a Body Save, DC 10 + half of their Highest Rank Bonus + their Constitution modifier, or the target takes 1d4 damage to a Body Attribute chosen when this evolution was acquired. The poison lasts for a number of rounds equal to half the eidolons Highest Rank Bonus + their Constitution modifier, providing a Save at the start of each turn. Purchasing this evolution, a second time allows the poison to affect a Mind Attribute, or a Soul Attribute if purchased three times.
3-point evolutions
Advanced Resistance
The eidolon gains Resistance in a tier 3 damage type equal to your Spirit modifier multiplied by half of your Highest Rank Bonus.
Advanced Senses
The eidolon gains either True Sight, See In Darkness, or Blindsight.
Fast Healing
The eidolon gains Fast Healing equal to your Spirit modifier.
Greater Animalistic Evolution
The eidolon gains an Advanced Animal Ability from the Animal Companion list.
Sapience
The eidolon becomes Sapient losing the Mindless or Animal Intelligence traits if they possess them and setting their base Intellect to 10.
Spell Resistance
The eidolon gains Spell Resistance equal to your Spirit modifier. This may be purchased one additional time to add half of your Highest Rank Bonus to their Spell Resistance amount.
Swallow Whole
When the eidolon successfully maintains a Grapple check against a target that they have Grappled you may swallow them as a Free Action. The swallowed target takes Crushing damage equal to 1d6 per Constitution modifier at the start of the eidolons turn. The creature can break free by doing an amount of Physical damage to the eidolon equal to their Constitution score while inside them.
Essence
Eidolons have a set of minor statistics and abilities known as their Essence. This Essence is thematically based on the eidolons base concept. They receive a number of Essence effects equal to your Spirit modifier. The following list of effects can be added to with GM approval.
Alignment
Each time this is taken the eidolon increases a chosen Alignment score by 2.
Attributes
Each time this is taken the eidolon increases a chosen Attribute score by 1.
Damage Reduction
Each time this is taken the eidolon gains DR of either a specific Physical damage type or a common material such as Silver, Cold Iron, and the like, equal to your Spirit modifier.
Material Vision
Each time this is taken the eidolon gains the ability to see through a specific type of material such as Cloudsight, Greensight, Ashsight, and so on.
Resistance
Each time this is taken the eidolon gains either double your Spirit modifier in Resistance to a single tier 1 energy-based damage type or your Spirit modifier in Resistance to two different tier 1 energy-based damage types.
Eidolon Concept Ability
When an Eidolon is created, they gain a single thematic ability from the following list that grants them an affect that only Eidolon’s can receive. These abilities are typically magical or supernatural in nature. The following list is primarily examples and can be expanded or tweaked as needed with GM approval.
Blinking Eidolon
Whenever this eidolon is targeted by a spell or magical ability, they may teleport to an empty location of their choice within a quarter of their base movement speed as an Immediate Action.
Brutal Eidolon
The eidolon gains a single additional Iterative attack on the All-Out Attack action, they gain a second additional Iterative Whenever you reach Master rank.
Echoing Eidolon
The eidolon may count as a being the origination point for any ongoing effect you create.
Sentinel Eidolon
Friendly creatures within natural reach of the eidolon treat Cover benefits as one step higher.
Spell Well Eidolon
This eidolon can reduce the cost of spells cast by a creature adjacent to them equal to half of your Highest Rank Bonus on a successful Mana Control check equal to the casting DC of the spell, minimum Mana cost 1.
Spotter Eidolon
The eidolon increases the effective range of ranged attacks made against enemies within their Reach by 10ft per half of their Highest Rank Bonus, and their maximum number of Range Increments by your Spirit modifier.
Spy Eidolon
The eidolon has a single alternative physical form chosen at creation that they may turn into by spending 10 minutes as if they were making a Disguise check. This form may be maintained for a number of hours per Long Rest equal to their Highest Rank Bonus. While in this form they lose access to any bonuses and abilities that would be provided by their original form, such as Size benefits and the like.
Tracking Eidolon
This eidolon chooses a single material, creature type, or other such concepts such as a particular emotion at creation. If the chosen concept has been in the area within the past Highest Rank Bonus hours they may attempt a tracking check with no penalties, even if it would not normally leave a trackable trail.
Tranquil Eidolon
The eidolon reduces any changes in Emotion track or penalties of Emotion-based effects for friendly creatures adjacent to them by an amount equal to half of their Highest Rank Bonus. This effect can only apply to each type of Emotion once, additional instances of emotion changes are unaffected.
Traveling Eidolon
The eidolon increases their Strength score for the purposes of Carry Capacity and Overland Movement by their Highest Rank Bonus. Additionally, they treat travel time increases from terrain as 5 percent less per half of their Highest Rank Bonus.
Tutoring Eidolon
The eidolon gives you a number of additional Downtime Actions equal to half of their Highest Rank Bonus.
Advanced Eidolon Concept Ability
Upon purchasing the Advanced Companion Talent for an Eidolon, the Eidolon may choose to gain the advanced form of their base concept ability or gain an additional base concept ability.
Blinking Eidolon
The eidolon may choose to take any movement they make as an instantaneous Teleport instead a number of times per Short Rest equal to your Spirit modifier.
Brutal Eidolon
The eidolon may make an attack as a Free Action against any creature that attempts a Parry or Repel check against them a number of times per Short Rest equal to your Spirit modifier.
Echoing Eidolon
The eidolon may duplicate a non-spell, magic, or supernatural instantaneous effect such as channel, as an Immediate Action whenever you activate such an ability. This ability does not consume additional resources and can be used a number of times per Long Rest equal to your Spirit modifier.
Sentinel Eidolon
The eidolon may attempt to Parry an attack they could normally Parry made against any friendly creature benefiting from their Cover a number of times per Short Rest equal to your Spirit modifier.
Spell Well Eidolon
The eidolon may reduce the DC of any magical skill actions, applying to all checks required to take that action, by half of your Highest Rank Bonus as an Immediate Action for any friendly creature within Line of Sight. This ability can be used a number of times per Long Rest equal to your Spirit modifier.
Spotter Eidolon
The eidolon may spend a Basic Action to designate the area within its natural reach as a designated target area until the beginning of their next turn. Enemies within this area may be targeted with ranged attacks even if not visible to the attackers. This ability can be used a number of times per Short Rest equal to your Spirit modifier.
Spy Eidolon
The eidolon may change the appearance of their alternate form by touching the creature they wish to copy the appearance of a number of times per Long Rest equal to your Spirit modifier. They revert to their original alternate appearance on a Long Rest.
Tracking Eidolon
The eidolon may attempt a Survival check in place of a Perception check as a Basic Action to locate a creature within the combat that is benefiting from Concealment, Invisibility, or another similar effect negating the penalties to locating them from such effects. If the Survival check is successful, the target gains no benefit from that instance of Concealment, Invisibility, and so on for the remainder of the encounter. This ability can be used a number of times per Long Rest equal to your Spirit modifier.
Tranquil Eidolon
The eidolon may shift an Emotion track from one creature to another creature within its reach as a Basic Action. If the new target is not a willing target, they receive a Soul Save, DC 10 + half of their Highest Rank Bonus + their Spirit modifier, to resist the effect. This ability can be used a number of times per Long Rest equal to your Spirit modifier.
Traveling Eidolon
The eidolon may touch themselves or a friendly creature within reach as a Quick Action, negating any penalty to movement from Difficult Terrain for that turn a number of times per Short Rest equal to your Spirit modifier.
Tutoring Eidolon
The eidolon may give up their turn to give a friendly creature within their natural reach an additional turn that round. They can use this ability a number of times per Long Rest equal to your Spirit modifier.