Caliborn, the Final Reckoning

Flash, haste, indestructible
When Caliborn enters the battlefield, destroy all creatures that attacked or dealt damage since your last turn. Then exile all creatures other than Caliborn. For each creature exiled this way, create a token that's a copy of it. If that creature was controlled by an opponent, that player creates a token that's a copy of it at the beginning of the next end step. Those tokens have double strike.