Blood-Queen Lana'thel is the last boss in the Crimson Hall of Icecrown Citadel.Former countess, now Blood Queen of all San'layn, Lana'thel was one of the blood elves who followed Kael'thas' lead into Northrend, in pursuit of Arthas after he tainted the Sunwell. She was the one that brought Thalorien Dawnseeker's famous blade - Quel'Delar - from the commander's dying place at the Dead Scar into the frozen north. When she and some of her friends were slain by the Scourge, Lana'thel was raised by the Lich King as a San'layn, or a Darkfallen, to lead the undead armies in Northrend and to lead the other San'layn.