Who would win in a battle, the dark lord of the wizarding world, Voldemort or the lord of the dark side, Darth Vader?
Both have full access to their sources of power (magic and the force) all weapons are already drawn (wand and lightsaber)
Fight is in Mordor
Battle is to incapacitation or death (who am I kidding, their going for the kill)
Who wins and why?