Marchesa, Assassin Queen

When Marchesa enters the battlefield, you
become the Monarch.
At the start of your upkeep, create a 1/1 red
assassin creature token with haste if you are
not the monarch.
At the start of your endstep, create a 1/1 black
assassin creature token with deathtouch if you
are the monarch. "
—
One wins by having no competitors - Queen Marchesa