Deathwing is one of five Dragon Aspects and leader of the black dragonflight. Thousands of years ago, Neltharion was empowered by the Titans with dominion over the earth and the deep places of Azeroth. However, driven mad by the Old Gods, he turned against the other Aspects during the War of the Ancients. Among both mortals and dragons his name has become one whispered with a feeling of fear and contempt. This was also the exact point where Chernabog approached Neltharion to join the Dark Spawn Council, to which Deathwing agreed only half-heartedly. But after Chernabog was defeated in battle, Deathwing was quick to leave the Dark Spawn and escape the Banished Realms
The black aspect involved himself in Second War, adopting the form of Lord Daval Prestor, in order to destroy the Alliance from within. He also managed to turn his greatest enemy, Alexstrasza, into a slave of the Horde, with whom he later allied himself. After suffering a series of defeats culminating with his being chased off by the other Aspects, Deathwing retreated to the elemental plane Deepholm to recuperate. From Deepholm, Deathwing observed his former mate Sintharia's experiments with the twilight dragonflight in Grim Batol. Deathwing now continues his late consort's work.
Deathwing will make his return as the primary antagonist in World of Warcraft: Cataclysm, the third expansion. Though long believed by most to be dead, Deathwing is regaining his strength in Deepholm and plotting a return that will shake Azeroth to its foundations.
Deathwing has control over the land and its fathoms, including lava. His main attack, and that of his dragonflight's, is to use his breath as a cannon of lava. He can live within volcanoes and high temperature areas.