Meaty Cranium

"“You are struck by the impression of being enclosed, somehow - a thickening, as though the world around you is receding. Reaching up to your face, your fingers find unfamiliar topography: ridges and ravines that jut from solid bone. Something stumbles inside you, your thoughts colliding and reforming into new configurations. Your fingers stall and finally fall away, no longer able to distinguish the new from the old.” —In-game description"

Effects

 * Chance to release a Crab Meat cluster when you get a Critical Hit
 * +40 Health