Kill 10 Glopgut Ogres. Your Twilight's Hammer disguise will automatically apply while inside Glopgut's Hollow.
Your disguise is ready, <name>. Whenever you go north into Glopgut's Hollow now, your Twilight's Hammer regalia will fool the ogres.
The rest of the plan is simple: you kill a bunch of Glopgut ogres, and they blame the cult. Are you ready to create some havoc in the ogre camp? I thought so.