Demon - Raw destruction given material substance, demon eidolons form out of the Abyss's stew of soul energy, leading some scholars to speculate that the summoner's arts are related to the magical tampering that gave rise to the first demons. Demon eidolons revel in causing destruction and inflicting suffering, and they will do so for their summoners without question, taking pleasure in whatever havoc they can create. For a demon eidolon, the means justify the ends.
Alignment: Chaotic evil.
Base Form: Quadruped (limbs [legs, 2], bite)
Starting Statistics: Size Medium; Speed 40 ft.; AC +2 natural armor; Saves Fort (good), Ref (good), Will (poor); Attack bite (1d6); Ability Scores Str 14, Dex 14, Con 13, Int 7, Wis 10, Cha 11.
Purchased Evolutions: 1 point - Claws, 2 points - Ability Increase (Str+2)
Base Evolutions: Starting at 1st level, demon eidolons gain the resistance (electricity) and resistance (fire) evolutions as well as a +4 bonus on saving throws against poison.
At 4th level, demon eidolons gain acid resistance 10 and cold resistance 10.
At 8th level, demon eidolons lose the +4 bonus on saving throws against poison and gain immunity to poison. They also add 1 point to their evolution pools.
At 12th level, demon eidolons gain DR 5/good. They also gain the ability increase evolution in an ability score of the summoner's choice.
At 16th level, demon eidolons lose the resistance (electricity) evolution, and instead gain the immunity (electricity) evolution. They also gain telepathy.
At 20th level, demon eidolons gain true seeing as a constant spell-like ability.