Mark of Norgannon

Source
This item can be found inside Alexstrasza's Gift after defeating Malygos in the 25-man version of the Eye of Eternity.

Effective Haste
If used every cooldown this item grants: 491 * 20 / 120 = 491 * 1 / 6 = 491 / 6 = 81+ 5 ⁄ 6 Haste Rating As 32.79 Haste Rating = 1% Haste(At 80), the effective %Haste granted is: 111.6667 / 32.79 = 3.41% Haste