Reaper of Sheoldred is a uncommon Creature — Phyrexian Horror card from The List (PLST), collector number NPH-72. Current market price: $0.92, TCGplayer market prices via Scryfall.
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Whenever a source deals damage to this creature, that source's controller gets a poison counter.