Player > Feats > Adaptive Casting
You have a few extra eldritch tricks up your sleeve.
Key ability score 19, caster level 7.
Select three spells from class spell lists you can cast spells from. They must be at least 1 level lower than the highest spell level you can cast. Once per day, you can cast one of these spells as a spell-like ability. Each time you gain a caster level, you can change which three spells you have selected with this feat.