Report to Cenarion Observer Shayana at the Surwich in the Blasted Lands.
I believe that the taint of the Blasted Lands has finally exerted its influence over my friend Wormthorn. His experiment is failed, and his great-tree now only serves as a focus for the demons to rally around.
The tree must come down, and Wormthorn with it. Speak with the Cenarion Observer on the other side of town; she should have some idea how to proceed.
<name>: the act we are about to commit must not be made known to the townspeople of Surwich. Morale is low enough as-is.