Jin'rohk, The Great Apocalypse

Source
This item dropped from Zul'jin in the level 70 10-man raid version of Zul'Aman. Possibly the Amani equivalent or brother of the great two-handed sword Zin'rokh, Destroyer of Worlds.

The 45 Haste rating on this weapon gives a 2.85% increase in weapon speed, making its actual weapon speed 3.6.