Bring Grenka's Claw to Dorn Plainstalker in Thousand Needles.
I'm pleased to see your courage remains steadfast in light of what you've already done. Since your faith is intact, the time has come to test your body.
First is a test of endurance. Go with friends to the Roguefeather Den west of Freewind Post. Make your way to the depths of their lair and destroy their foodstuffs. By then you should have provoked their fury, and if you are able to survive long enough, Grenka Bloodscreech herself will come for you--kill her and bring me her claw to complete your test.