K'rrik, Son of Yawgmoth (MH3-274) - Modern Horizons 3

({B/P} can be paid with either or 2 life.)
Lifelink
For each in a cost, you may pay 2 life rather than pay that mana.
Whenever you cast a black spell, put a +1/+1 counter on K'rrik, Son of Yawgmoth.