Use the disguise to gain access to the chamber, then slay Thar'zul and Elux'ara Darkscorn beneath Karazhan in Deadwind Pass.
- Essence of Wyrmtongue (Provided)
The time has come at last.
Deep within the cavernous underbelly of Karazhan lies a long-forgotten chamber. Based on what you learned from our demon friend, I believe this is where its mistress dwells.
This demon's master must come from the highest ranks of the Burning Legion. This does not bode well for Karazhan.
We need to secure Deadwind Pass, <name>.
You must find this demon and destroy it.