Phalexar, Shadow of Eternities

Shroud, protection from deathtouch and exile
Apex (This creature attacks alone and must be
blocked by each creature defending player controls.)
Whenever Phalexar, Shadow of Eternities deals
combat damage to a player, it assigns no combat
damage this combat. If that opponent doesn't win
the game at the end of his or her next turn, that
player loses the game instead.