Defiler of Flesh is a rare Creature — Phyrexian Horror card from Dominaria United (DMU), collector number 400. Current market price: $0.70 (foil $0.71), TCGplayer market prices via Scryfall.
Menace As an additional cost to cast black permanent spells, you may pay 2 life. Those spells cost {B} less to cast if you paid life this way. This effect reduces only the amount of black mana you pay. Whenever you cast a black permanent spell, target creature you control gets +1/+1 and gains menace until end of turn.