Ultraxion is a minor antagonist of the online game World of Warcraft.
Despite his short time in existance, Ultraxion has become one of the most powerful Twilight Dragons to have ever been born. He is now much more of an abomination of dark energy than a dragon. He is the only Twilight Dragon to be praised by Deathwing himself, and his own arrogance has led him to make an attack on Wyrmrest Temple.
At the top of the Wyrmrest Temple he found an army of adventurers, as well as the Dragon Aspects - Alextrasza, Ysera, Kalecgos, and Nozdormu - and former-Warchief Thrall. In this final battle, Ultraxion fades in and out of the Twilight Realm, taking the heroes with him. Unfortunately, he is killed, and such a monstrosity is put to an end.