Warmace of Taran Zhu

The Warmace of Taran Zhu is the weapon of Taran Zhu, Lord of the Shado-Pan. He uses the weapon in conjunction with unarmed attacks like most monks.

Taran is shown using the mace during the Siege of Orgrimmar Patch 5.4.0 trailer, using it to disarm Garrosh Hellscream.

Source
This item drops from Taran Zhu in Shado-Pan Monastery.