Bringer of Dark Storms

Flying, deathtouch
Encore {4}{b}{b} (Exile this card from your
graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

Whenever an opponent loses the game, you may
return Bringer of Dark Storms from exile to your graveyard.