Voldemort VS Sauron
Through strange circumstances, after their inevitable defeat by the erstwhile heroes of their respective universes, the two greatest villains in fantasy history met. Voldemort decided sauron was a threat and used Avada Kidavra on Sauron. Sauron was unaffected and hit Voldemort with his Axe\Sword thing. The blade cut Voldemort in half and threw him 300 feet away. Voldemort died instantly and Sauron later died of boredom after killing every villain in the after life.