Protean Blast

Eldritch Invocation

Throughout the occult lore that you looked through, you find that Eldritch Blast only does Force damage. As you wonder, it's annoying if you want to be creative with your cantrip that "Eldritch Saw-blades! Oh sorry it's just some magical energy damage." but now, you found scraps of occult lore at the darkest places that allow you to get creative with your iconic warlock cantrip. Choose one of the benefits which allows your Eldritch Blast to change it's damage type when you hit a creature or object.

Eldritch Ballistics. You can change its damage type to one of the following: Slashing, Bludgeoning, or Piercing.

Elemental Blast. You can change its damage type to one of the following: Fire, Cold, Acid, Lightning, or Thunder.

Maddening Methods. You can change its damage type to one of the following: Poison or Psychic.

Virulent Beams. You can change its damage type to one of the following: Radiant or Necrotic.

Repeatable. You can gain this Invocation more than once. Each time you do so, choose a different benefit.