Daud, Knife of Dunwall

Commander Blink {b}{b} (Exile target unblocked attacker you control, then return it to the battlefield under its owner's control: Put this card onto the battlefield tapped and attacking)
Whenever one or more Assassin's you control deal combat damage to a player, create a 1/1 Black Assassin creature token with Deathtouch. Then,
if an opponent was dealt damage this turn
by 10 or more Assassins, they lose the game.