Slashgrats
Slashgrats 81: Hate Leads To Suffering
Defeat Taran Zhu while every party member is at maximum hatred in Shado-Pan Monastery on Heroic Difficulty.
A full hatebar leads to the debuff: Haze of Hate with +20% physical damage, -25% healing done and -90% hit loss
Remember to communicate with your group. EVERYBODY in the group needs to have maximum hatred to get this achievement. Pets are not affected by the -90% hit loss so use them wisely.