Otonbu the Sage at Telaar in Nagrand wants you to use the Torch of Liquid Fire to destroy 10 Sunspring Villager corpses. Return the Torch of Liquid Fire when the task is complete.
10x Sunspring Villager Corpse Burned
I have just gotten word of a catastrophe of epic proportions, [player]. The foul Murkblood have sacked the orc village of Sunspring Post, northwest of here, and murdered its residents. To make matters worse, they have begun dumping the bodies into Sunspring Lake. Should those bodies rot, our primary source of water in the region will be compromised.
It's a gruesome task that I give you next but it must be done. Take this enchanted torch and return to Sunspring. Burn all of the rotting orc corpses...