Ghaulathator

Wintercloak was an ancient white dragon slain in the time of Netheril.

History
In 3426 NY (−433 DR), Wintercloak flew under the floating city of Lathery, over the Narrow Sea in Netheril, and was teleported into one of the city's cold storage chambers, as part of its fishing system. Wintercloak tore itself free and broke out into the city streets, but was confronted by Veridon and the city's arcanists. Wintercloak slayed Veridon and a dozen with its icy breath, but was slain by the survivors.