Menace (This creature can't be blocked except by two or more creatures.) 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 (This creature can't be blocked except by two or more creatures.) until end of turn.