The Frostbrood are elite frost wyrms that were raised from the bones of blue dragons at Sindragosa's Fall. These frost wyrms are now one of the strongest weapons the Scourge have. They consist of Frostbrood Whelps, Drakes (Vanquishers), and the mighty wyrms themselves. Sindragosa is the leader of the Frostbrood and was the first Frostbrood raised, by the Lich King himself.