Valhalla

Valhalla is Odin's establishment in Asgard.

Overview
In Norse religion, Odin was believed to rule over Valhalla. The vikings believed that warriors glorious enough are able to enter Valhalla.

History
In Vinland, 1000, Damien Darhk disguised himself as Odin in front of the vikings. Nora Darhk claimed that Odin left Valhalla in Asgard to lead them to battle. The next day, when the Legends attacked Damien Darhk, Nora ordered the vikings to protect Odin if they desired to see Valhalla.

Behind the scenes

 * In Norse mythology, Valhalla is a majestic, enormous hall located in Asgard, ruled over by the god Odin. In Valhalla, the dead join the masses of those who have died in combat, known as einherjar (singular: einherji), and various legendary Germanic heroes and kings, as they prepare to aid Odin during the events of Ragnarök.