Marl Wormthorn is a hostile worgen located in the Tainted Forest, Blasted Lands. He is enshrouded in a trance, so you need the quest item from the quest with the objective, so you can kill him. He is inside a great tree, many demons are around him, so try not to pull all the aggro.
Abandonding Gilneas EditThis section concerns content exclusive to Cataclysm.
Hailing from the Kingdom of Gilneas, Marl Wormthorn learned the ways of Druidism until he was one of many inhabitants that became inflicted by a curse which turned them into Worgen. His mind was healed soon after and participated in an evacuation when the Forsaken led by Sylvanas Windrunner were invading the nation.
Corrupted by the Legion EditThis section concerns content exclusive to Cataclysm.
After the evacuation, Marl ventured from Gilneas to the Blasted Lands and set up residence at the Tainted Scar. He made an attempt to reclaim this land and bring and use his power to bring the land back to its former, greener self. There, he created Maldraz and entered a druidic trance. In his trance, he was able to bring life back to the entire area, which was beginning to grow lush again. Everything seemsed to work until Burning Legion began to use its residual demonic powers to spread across on the land.
While his attention was to fight back the Legion in the Scar, the Nathrezim, who had formerly resided there, took the chance to find and enter Madraz and corrupt Wormthorn's trance, making him go insane during the process. Losing his former self, Marl Wormthorn was trapped and his whole body was in control by the Legion and used as a weapon to corrupt the land rather than restoring it. That was when he was finally killed by Adventurers from the Alliance or Horde to prevent the forest from been tainted.