The Einherjar are Odin's personal bodyguard of ghost warriors. The Lord of Asgard has used his peerless command of necromancy to grant them the power to manifest corporeally and they are armed with enchanted armour and weapons. His valkyries search across all the worlds linked to Yggdrassil to retrieve the ghosts of the bravest, deadliest and most skilled warriors at the moment of death and bring them to Asgard so that Odin may form them into einherjar.