Cataclysm

The Cataclysm is a crafted legendary two-handed mace in Diablo III. It requires character level 52 to be used. Its level 70 equivalent is Sunder.

The weapon's special effect creates cracks in the ground within roughly 35 yards of the bearer (not of the attack's target) that slow enemies within that range for roughly 60%, but fade after several seconds.

It is also one of the few weapons that can roll increased Critical Hit Damage.

Crafting
The Cataclysm can be crafted using the Plan: Cataclysm, 15000 gold, 15 Reusable Parts, 15 Arcane Dust and 16 Veiled Crystals.