Etrata, the Silencer (GRN) from Guilds of Ravnica, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Bastien L. Deharme
• Card Text:
  Etrata, the Silencer can't be blocked.
  Whenever Etrata 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. Etrata's owner shuffles Etrata into their library.