Androx, Prince of Death

+20: Exile all Card but this one on the battlefield and Graveyard. Summon Androx's Dragon. It's Damage and HP is the toughness of all exiled cards.
-18: Double target Dragon or Demon's Toughness. If target is Androx's Dragon, summon an X/X Death Knight, where X is the toughness of Androx's Dragon.
-20: Restart the game. Deal 19 damage to Target player and all creatures he or she controls. This can only be used twice.