Etrata, the Silencer
{2}{U}{B}
Legendary Creature -- Vampire Assassin
3/5
~this~ can't be blocked.
Whenever ~this~ deals combat damage to a player, exile target creature that player controls and put a hit counter on that card. That player loses the game if they own three or more exiled cards with hit counters on them. ~this~'s owner shuffles ~this~ into their library.