Report to Saurfang the Younger at the Kor'kron Vanguard.
You have done well, $g brother:sister;. All that you have faced, you have done as a champion of the Horde. The Scourged Anub'ar of Azjol-Nerub, crushed under your foot! The taunka, brave and powerful new members of the Horde, because of you! Our super-weapon against the Scourge, tested and perfected by you!
The time has come, the moment is now - our elite soldiers at the Wrathgate need you. The son of Saurfang awaits your arrival at the Kor'kron Vanguard. Go now, northeast to the Wrathgate.