Defiler of Flesh is a rare Creature — Phyrexian Horror card from Magic Online Promos (PRM), collector number 103432.
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.