Collect 4 Soul Remnants from Gorefiend in Hellfire Citadel on Heroic difficulty.
As you defeat Gul'dan's minions, his hold over this fel citadel weakens, allowing me to teleport you and your allies deeper into the dark halls. If I only I had some Soul Remnants - four of them, let's say - none of this would be necessary, and I could harness that power to send you directly into the upper reaches of the Citadel.
You will learn:
You will also receive: