Seek out the
near the entrance to [Eye of Twilight ] Gar'gol's Hovel in Hyjal.
ogre clan aross the lake is led by Gar'gol. I use the term loosely; Gar'gol has the intelligence of raw beef.
So far as I can tell, Gar'gol is taking orders from a magical instrument: "The Eye of Twilight." He follows its commands unquestioningly.
If we can sabotage the eye, we can cause unimaginable havoc.
Go to Gar'gol's hovel and seek out the Eye of Twilight near the entrance. Study it. Find a way to subvert it. Ah, marvelous chaos...
<You approach the Eye of Twilight. As your fingertips graze its luminescent surface, you are away of a malignant presence peering back at you, searching your soul.>
<Instinctively, you draw back.>
and  Cleaning House before heading out. The Eye is just to the west of the cave entrance.
 From the Mouth of Madness
 The Return of the Ancients
 End of the Supply Line
/  The Voice of Goldrinn  The Voice of Lo'Gosh
/  Goldrinn's Ferocity  Howling Mad
 Lycanthoth the Corruptor
 The Shrine Reclaimed
 Cleaning House
 From the Mouth of Madness  Free Your Mind, the Rest Follows
Eye of Twilight side chain
 The Eye of Twilight
 Mastering Puppets
 Elementary!  Return to Duskwhisper
 Gar'gol's Gotta Go  Get Me Outta Here!
Foray into the Firelands
 Lightning in a Bottle
 Into the Maw!
,  Forged of Shadow and Flame ,  Crushing the Cores  Rage of the Wolf Ancient
 Cindermaul, the Portal Master
 Forgemaster Pyrendius  Return from the Firelands