World of Warcraft Getting Another Raid Dungeon

Blizzard intends to add a new Ruby Sanctum raid in the forthcoming v3.3.5 patch for World of Warcraft, and rather than have testers confused over what they've stumbled upon, the team has quickly profiled the dungeon over on the official forums.
A powerful war party of the Black Dragonflight, led by the fearsome Twilight dragon, Halion, have launched an assault upon the Ruby Sanctum beneath Wyrmrest Temple. By destroying the sanctum, the Black Dragonflight look to crush those that would stand in the way of their master's reemergence into Azeroth and to ultimately shatter the Wyrmrest Accord the sacred bond that unites the dragonflights.

The battle that is to come will surely deal a crippling blow to the Red Dragonflight, however, it is up to you to stop this unprecedented offensive and defend the Ruby Sanctum. First you must face the assault of Halion's servants, Saviana Ragefire, Baltharus the Warborn, and General Zarithrian, before squaring off against Halion the Twilight Destroyer, a new and deadly force in this realm.

The Ruby Sanctum will feature 10- and 25-player content, Heroic difficulties and all-new rewards! Stay tuned for more information as we get closer to its release.