This epic Canvas Art depicts the White Walkers in ready and charging front in battle mode. Viserion, the ice dragon after being killed is also there for the aid of the White Walkers.
Viserion was one of the three dragons born in the wastelands beyond Lhazar, along with Drogon and Rhaegal. He was named after Daenerys Targaryen’s elder brother, Viserys. Viserion is seen during the Great War being ridden by the Night King. During the Battle of Winterfell, his flames destroy one of the walls of Winterfell and the people within it. The White Walkers were created by the Children of the Forest thousands of years ago as a form of protection against the First Men who were cutting their sacred trees and slaughtering their tribe