Feat: Magical Master

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