Frostheart Phoenix - Warhammer Chaos and Conquest

As a Flamespyre Phoenix ages, its body cools, and even begins to sap heat from its surroundings. Finally the plumage that once blazed with fire grows heavy with frost and ice. Once this occurs, the Phoenix must leave the Flamespyres, for the chill that surrounds it causes agony in its brightly burning kin. Most such Frostheart Phoenixes dwell in lonely exile until their bodies finally freeze solid. Others return to the Shrine of Asuryan, to offer their final days in war gainst the foes of the High Elves.