Persistent Constrictor 22 (Commander: Duskmourn: House of Horror)

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.)

NM - $26.20
LP - $20.90
MP - $15.70
HP - $10.50
DMG - $5.30