Entropic Appearance (Ex): 2 Evolution Points

The eidolon appears as an entropic creature and manifests some of the abilities of a Protean. Spells and effects that target creatures with the chaos subtype or have specific effects against such creatures affect the eidolon as if it had that subtype. The eidolon gains a +2 bonus on saving throws against acid, electricity, sonic, and against movement impairing and polymorph spells and effects. It also gains an amount of spell resistance equal to 5 + its HD against spells with the Law descriptor.

The summoner must be chaos-aligned to select this evolution.

At 7th level, by spending1 additional evolution point, the summoner increases the bonus on saving throws to +4 and extends the spell resistance to affect any spells and spell-like abilities cast by lawful creatures.

At 12th level, by spending 1 additional evolution point, the eidolon gains immunity to acid, and polymorph effects, and has continuous Freedom of Movement as per the spell. Its spell resistance increases to an amount of equal to 11 + its HD. (The summoner must pay for the 7th-level upgrade before paying for this 12th-level upgrade.)

Amorphous Anatomy (Ex): 1 Evolution Points

The Eidolon’s vital organs shift and change shape and position constantly. This grants it a 50% chance to ignore additional damage caused by critical hits and sneak attacks. This ability requires Entropic Appearance. The summoner must be at least 8th level before selecting this evolution

Warpwave (Ex): 3 Evolution Points

A creature struck by any of your eidolon’s natural attacks must succeed at a fort save DC 1/2 HD + CON or be affected by a randomly generated warpwave. A creature can be affected by this ability only once per round. Creatures immune to polymorph effects are immune to Warwaves. This ability requires Entropic Appearance. The summoner must be at least 14th level before selecting this evolution.