Report to Melisara at Tarren Mill in the Hillsbrad Foothills.
Mug'Thol and his ogre warband was sent to Alterac to retrieve the Crown of Will for Lady Sylvanas. Unfortunately, instead of returning it, the idiot decided to try it on... I suppose ogres can't resist anything bright and shiny.
His bumbling actions have become something of a problem, however. The Crown of Will enabled him to resist the possession placed upon him to serve Lady Sylvanas.
The Dark Lady wants an example made, travel to Tarren Mill in Hillsbrad and report to Melisara, my lieutenant.