Mystiq.org - forum: Don't Kill the Fat One -> TBC -> Bugreport

Kilrath in Terokkar Forest has asked that you kill 10 Boulderfist Invaders and beat Unkor the Ruthless until he talks.

• The quest is turned in at Unkor after he submits and 10 infiltrators have been slain. Unkor will submit when he reaches approximately 30% health, at which point he becomes friendly. He will run off after about 5 minutes, so save him until all infiltrators have been slain.
  
• It has been reported[1] that if Unkor reaches 30% health while disabled (fear, stun, etc.) or if he is DoTted he will not properly submit and quest credit will not be awarded. If this is the case, he will reset after about 5 minutes. Try to use only direct-damage attacks and avoid crowd control.
  
• When Unkor is successfully defeated, he will say:

I give up! Please don't kill me!