Benefit: At 4th level, you learn a single least invocation from the warlock list. At 9th level, you learn a single lesser invocation. At 15th level, you learn a single greater invocation. These invocations cannot be eldritch shape or eldritch essence invocations. You can use them as a warlock of your character level. Drawback: You receive a -1 luck penalty to all saves, and gain 1 less hitpoint per level. Special:If you have levels in the warlock class, you can instead choose to gain +1d6 Eldritch Blast damage whenever this feat would grant you an invocation.