Destroy 8 Diseased Grizzlies, and then return to Mulgris Deepriver at the Writhing Haunt, Western Plaguelands.
To the east of where we are, near where the Eastern Plaguelands begin, once proud and majestic grizzlies roamed the countryside. The plague released by the Scourge has sundered these beasts too. They wander the countryside, agonized by the stiffening of their muscles and the rotting of their fur and flesh.
I ask of you to end their misery as well. The only cure for their suffering is a swift death, one that must be ministered by your hand.