The Rockpounder

The Rockpounder is a two-handed mace which increases the users chance to get a critical strike.

Source
This item drops from Archaedas in Uldaman.

Background
This massive club appears to be made of a series of stones melded together, with spiked chunks of rock scattered liberally across the surface. Although crude in appearance, a rockpounder is flexible, and does not suffer from the fragility of most stone weapons.