Vaal Hazak, Miasma Dragon

Infect
{b}{g}{x}, {t}: Put a -1/-1 counter on up to X target creatures.
{b}{b}{b}{b}{b}{b}: Remove any number of -1/-1
counters from creatures opponents control. Vaal
Hazak gets +1/+1 until end of turn for each
counter removed this way. Activate this ability
only as a sorcery.