Modus Anvilmar was the King of all the Dwarves, and had the Bronzebeards, Wildhammers, and Dark Iron clans all united under him at one time.
Episode of video game warcraft. The War of the Three Hammers was a civil war between the Bronzebeard clan (Ironforge clan), Wildhammer clan, and Dark Iron clan. The conflict began with the death of Modimus Anvilmar and exile of the Wildhammer and Dark Iron dwarves from Ironforge.APG 140 It continued when Emperor Thaurissan, leader of the Dark Iron clan, launched simultaneous assaults on the Bronzebeard city of Ironforge and the Wildhammer city of Grim Batol
Superficially, it is an axe resembling Trollbane, which drops in Zul'aman. However, there's no weapon in WoW that emulates this weapon too closely - it is probably unique to him, since it has eight blades and is almost a mace rather than an axe.