Stormwake, the Tempest's Reach

Source
This item drops from Al'Akir in the Normal version of Throne of the Four Winds.

Note
This weapon currently displayed in the tooltip is the caster version (intellect) of this weapon. The melee version (strength/agility) of this weapon has the following attributes:

841 - 1563 Damage Speed 2.60 462.3 DPS No spell power increase.