Scion of the Outer Planes

Planescape Campaign.

Your connection to an Outer Plane infuses you with the energy there. Choose a type of plane listed in the Planar Infusion Table. Your choice gives you a resistance to a damage type and the ability to cast a cantrip, as specified in the table. You can cast this cantrip without material components, and your spellcasting ability for it is Intelligence, Wisdom or Charisma (choose when you select this feat).

Planar Infusion