Call to Valhalla

You draw a bladed weapon and give yourself a small cut and roll the hit die to see how much life you lose. You create a portal to Valhalla in which 20 barbarians emerge from. These barbarians are 1st level, have a life total equal to the life you lost, and have the weapon you used to draw blood. These fallen barbarians do your biding and last 1 day before returning to Valhalla or until they die.