Defiler of Flesh (PDMU-90P) - Dominaria United Promos Foil

Menace
As an additional cost to cast black permanent spells, you may pay 2 life. Those spells cost 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.