Crystallized Skull

"“There is a sense of ebbing - a receding tide that pulls you with it, out into the starlit expanse. There you drift, detached and watchful, as shards of crystal blossom from your lips, your skull, your eye sockets. The dead ocean roar rushes in as the last pieces of flesh slide wetly from new crystalline spikes. You'll know this sound, in time, and begin to hear it for what it is; not an ocean, but a chorus of innumerable voices.” —In-game description"

Effects

 * Chance to release a Crystal Cluster when you get a Critical Hit
 * +40 Resistance