This quest is not available in game.
Obtain Corrupted Blood of Teron'gor from Teron'gor in Auchindoun [Heroic only].
I just received dark news from Exarch Maladaar that may be of use to us. Shadow Council agents have infiltrated Auchindoun! I guarantee Gul'dan's minions are behind this - likely Teron'gor, his right-hand orc.
Let's pull him from the chessboard, <name>. Kill Teron'gor!
Bring me a vial of his corrupt blood, and I can use it to track down other Shadow Council troublemakers... Including Gul'dan. Our prey will not be able to hide.