Magical Master Feat 18
Source Pathfinder Impossible Magic
Prerequisites Magical Adept
Your eidolon gains a bevy of lower-rank spells. Choose an innate spell of your eidolon's tradition of each of the spell ranks from 1 to 7 in which your eidolon doesn't currently have an innate spell from Magical Adept. Your eidolon can cast each once per day as innate spells.
You can swap these spells at every even level, but your eidolon can never know more than one spell of each spell rank 1 through 7.
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.