Goffrden Meistermind

Goffrden Meistermind enters the battlefield
tapped.
{b}{b}{b}, {t}: Put X -1/-1 counters on target
creature and gain X life, where X is that
creature's converted mana cost. Then, put a
-1/-1 counter on Goffrden Meistermind.
{b}{b}{b}: Remove a -1/-1 counter from target
creature.