Necrogen Rotpriest is a uncommon Creature — Phyrexian Zombie Cleric card from Phyrexia: All Will Be One (ONE), collector number 296. Current market price: $0.19 (foil $0.25), TCGplayer market prices via Scryfall.
Toxic 2 (Players dealt combat damage by this creature also get two poison counters.) Whenever a creature you control with toxic deals combat damage to a player, that player gets an additional poison counter. {1}{B}{G}: Target creature you control with toxic gains deathtouch until end of turn.