Persistent Constrictor [Duskmourn: House of Horror Commander] Elder Demon If the player doesn't discard

If the player doesn't discard a card this way

Set: Commander Masters Type: Enchantment Rarity: Rare Cost: {B} At the beginning of each end step

Set: The Brothers' War Prerelease Promos Type: Legendary Artifact — Powerstone Rarity: Rare Cost: {5} When The Mightstone and Weakstone enters the battlefield

"It's a difficult task to quarantine a plague that moves with the clouds

Set: Murders at Karlov Manor Prerelease Promos Type: Land — Mountain Plains Rarity: Rare (T: Add R or W

Persistent Constrictor [Duskmourn: House of Horror Commander] Elder Demon If the player doesn't discardSet: Duskmourn: House of Horror Commander Type: Creature Snake, Zombie Rarity: Rare Cost: {4}{B} 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.)