How is this not a thing?
You’ve heard the call of the gods, but not quite that strongly.
Prerequisites: Wisdom 15, character level 5th, no levels in mystic.
Benefit: Choose two 0-level mystic spells and one 1st-level mystic spell. You can cast the 0-level spells at will and the 1st-level spell once per day for every 3 character levels you have. Your caster level is equal to your character level, and the key ability core for these spells is Wisdom. If you later gain levels in mystic, you lose the benefits of this feat and can replace it with either Spell Focus or Spell Penetration.