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.