Magical Adept Feat 8
Source Pathfinder Impossible Magic
Prerequisites Magical Understudy
Your eidolon gains more magic. Choose one 2nd-rank spell and one 1st-rank spell of your eidolon's tradition. Your eidolon can cast them each once per day as innate spells. At every even level after you take this feat, your eidolon can swap one of these innate spells for a new innate spell that's 2 or more ranks lower than your highest-rank spell slot.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
EvolutionFeats with this trait affect your eidolon instead of you, typically by granting it additional physical capabilities.
SummonerThis indicates abilities from the Summoner class.