Pestilent Souleater is a common Artifact Creature — Phyrexian Insect card from New Phyrexia (NPH), collector number 149. Current market price: $0.14 (foil $0.38), TCGplayer market prices via Scryfall.
{B/P}: This creature gains infect until end of turn. ({B/P} can be paid with either {B} or 2 life. A creature with infect deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)