Spellcasting Eidolon

[Verzen]

One of the things I kinda want is a spellcasting Eidolon. One that isn't great in combat, but has focus spells, cantrips, and normal spells as its own as spell like abilities. IMO this would really help differentiate up what kinda Eidolon you have.

[KrispyXIV]

I love the concept, but I think Magical Evolution and Greater Magical Evolution tell us where the developers currently place the power level of such a theme.

Two examples of feats that could capture this feel without significantly altering this balance Equation-

A feat that gives an extra slot of each level for Greater Magical Evolution

A feat that lets an Eidolon cast its summoners spells from the Summoners slots.

[Alchemic_Genius]

A feat that lets the eidolon use the summoner's spells sounds a lot like that familiar master ability that allows you to originate you spell from your familiar; which is to say, it's awesome, flavorful, and probably a solid 4th level feat