Void Reaver, aka "Daddy Reaver"
Blizzard actually gave the world a present this year; that being free attunement to all of their semi-uber instances to fast track everyone to the Black Temple and beyond. With that present came Void Reaver, a large angry fellow who strikes fear into everyone's minds. Many a Fel Reaver claimed L60's in Hellfire Penninsula, so it was time for some payback.
Content received from: Strangely Ironic, http://www.strangelyironic.net