Revak, Raven Lord

Lifelink, Vigilance
When you gain life, target opponent loses that much life and you put a +1/+1 counter on target creature
{w/b}{3}, Target player gains 3 life
{w/b}{w/b}{4}, {t}, Target player loses 7 life, and Revak, Raven Lord does not untap during your next untap step