Your search for "persistent constrictor 52" revealed the following:
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...
Persistent Constrictor - Extended Art (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...