So we had a big announcement at Gamescom this month, and we know now that World of Warcraft is getting a big new expansion, Legion.
Sescheron, the fallen.
From this whirling nightmare, this bloated ruin of the first evil's corpse crawled the demons. The Burning Hells could in a real sense be said to be the blackened corpse of Tathemet itself, and at the center of the Hells lies the Black Abyss, from which rose the Great Evils. Essentially birthed from the seven heads of Tathemet, there were the three Primes -- Mephisto, Baal and Diablo -- and the four Lessers.
The barbarians of Sanctuary are called this by those who do not understand them or their ancient culture, which was a casualty of the schemes of Baal and the actions of Tyrael. In destroying the Worldstone, they destroyed Mount Arreat and with it the very vigil that the barbarians maintained for countless eons.