The Crimson Hall is an area inside the northern side of Icecrown Citadel. This section is the headquarters and home of the San'layn, the vampiric darkfallen blood elves in the service of the Scourge. The area is luxuriously decorated in red decorations and scarlet coloured curtains similar to other blood elven decor. The Hall is connected to the rest of the instance by the Spire surrounding the Frozen Throne in the middle level of the zone.
The Crimson Hall opened on January 19, 2010, two weeks after the opening of the Plagueworks.