# Eldritch Adept *Source: Tasha's Cauldron of Everything p. 79* **Prerequisite**: Spellcasting or Pact Magic feature Studying occult lore, you learn one [Eldritch Invocation](/Rules/Source/lists/list-optfeaturetype-ei.md) option of your choice from the warlock class. Your spellcasting ability for the invocation is Intelligence, Wisdom, or Charisma (choose when you select this feat). If the invocation has a prerequisite of any kind, you can choose that invocation only if you're a warlock who meets the prerequisite. Whenever you gain a level, you can replace the invocation with another one from the warlock class.