WOTLK Classic the players destroyed Yogg'Saron's body and left only traces of its influence to wither and evaporate without sustenance. from wangyue's blog

It is no surprise that both the Horde and Alliance weren't particularly impressed with Sylvanas Windrunner, WoW's leader of the Forsaken WOTLK Gold. She said that Putress was acting on behalf of the Legion and not under her own directives, even though several doubted her claims. As she claimed, Varimathras one of the gods was able to take over the Undercity under her control, even though she was working with Northrend. The Horde, begrudgingly helping, and the Alliance looking to get revenge on Bolvar, stormed the Undercity and wrested control It from Varimathras. Whatever the outcome it was the Alliance remain furious about the betrayal of their faith that had caused them to lose so many lives.

The Horde and Alliance continue to argue about vengeance and pride and pride. A demon far older and more dangerous in comparison to the Lich King was apparently awakened. In the past there was a time when the Titans had detained a variety of Old Gods upon Azeroth to protect them from the threat of destroying the planet by using void magic. 

They put powerful structures under the charge of one of their prisoners, Yogg-Saron, but the specific Old God had spent countless ages poisoning the land around it with the blood of its own, spreading its destructive influence far and wide. As time passed, the professed God of Death managed to gain control over its own prisoners by arranging a plan to disarm itself. Players would have to venture into the city of Ulduar that was constructed by the Titans to serve as a tomb , but has instead become a fortress for the terrible evil inside.

Under constant assault from terrifying, eldritch creatures that were twisted and twisted to create terrifying nightmares, Azeroth's heroes attacked deep into Ulduar and redressed the damage while removing the Old God's corrupted nature. With the help of the rejuvenated Titanic wardens who had been watching over Yogg-Saron for centuries, the players gained the power to stop the evil reign of Yogg completely and forever. 

Even though killing Yogg'Saron was not considered to be possible, killing an Old God was not thought impossible, similar to what the case with C'Thun in buy WOTLK Classic Gold World of Warcraft: WOTLK Classic the players destroyed Yogg'Saron's body and left only traces of its influence to wither and evaporate without sustenance.