Valhalla (Galaxies at Wars)

Valhalla is a mysterious place in Galaxies at Wars. It's a place where the fallen warriors go to be judged by their actions. Although it is only meant for souls, Valhalla can be accessed by living human beings, although the ones who enter it, can't get one and are placed in a kind of a coma. The only known portal is located on the planet Kirbuk, who later becomes a colony of the Democratic Alliance of Planets, after John and Luna are pushed into the portal by a rebel who saves them by doing so. 
They spend five years in Valhalla. In Valhalla living beings don't age one bit, which means that John and Luna are still in their 20s when they get out of Valhalla. To get out of Valhalla the humans have the portal has to be activated and one human has to take the place of the human who wants to get out of Valhalla. 
John and Luna are freed by rebels, who sacrifice two captured soldiers from Iscariot to free the two. After getting out of Valhalla they restart their revolution against Iscariot. 
Valhalla is linked to a ghost world where John and Luna are transported after the final battle.