Yogg-Saron, the final boss encounter of the Ulduar raid dungeon, will have a big nerf tonight, as the Guardians of Yogg-Saron have ceased mind-controlling players, as well as becoming "more forgiving" in their spawn rate. Additionally, flash-frozen players that touch a cloud will no longer bring forth a Guardian.

Flame Leviathan, is the first boss encounter in Ulduar, found in the Formation Grounds, will be nerfed as well. The amount of extra health he gets per tower up was reduced and the snare effect of Hodir's tower removed. Additionally, vehicles caught in a flash freeze will be freed with a single shot from a Demolisher or Siege Engine cannon. Players will also not go quite so high when ejected from Flamey following a stun, which should make them a bit easier to pick up.