Quest:Dissension Amongst the Ranks... (Horde)

Objectives
Slay 5 Crazed Colossus while in disguise as an Illidari blood elf and return to Overlord Or'barokh at Shadowmoon Village in Shadowmoon Valley. He will also want his Kor'kron Flare Gun returned.
 * Crazed Colossus slain while in disguise (5)
 * Kor'kron Flare Gun
 * Enchanted Illidari Tabard(Provided)

Description
Researcher Tiorus was kind enough to put this concoction together for the final strike. I merely pour it upon this tabard that you have provided for me and the item is imbued with the essence of the Illidari filth. Take the enchanted tabard and travel to the Eclipsion Fields, southwest of Eclipse Point. Once there, use the tabard to transform into an agent of Illidan. While in disguise, slay the crazed colossi that wander the field. They will think it an attack by the Eclipsion and sever all ties!

Reward
You will also receive:

Progress
You have returned!

Completion
Well, well, well... If it isn't the grunt I sent out into the field. You're back and in one piece.  I knew you wouldn't let me down, soldier. You've stopped a major Illidari advance and, in doing so, earned yourself a little reward.

Gains
Upon completion of this quest you will gain:
 * 19000 XP (or at level 70)