Persistent Constrictor (DSC) from Duskmourn: House of Horror Commander, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Steve Ellis
• Card Text:
  At the beginning of each opponent's upkeep, they lose 1 life and you put a -1/-1 counter on up to one target creature they control.
  Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)