Sorin, Emperor of the Night

Flying, indestructible, vigilance
When this card transforms into Sorin, Emperor of the Night, put X +1/+1 counters on it, where X is the number of creatures that died this turn.
{t}: Create X 1/1 black Bat creature tokens with lifelink, where X is the number of +1/+1 counters on Sorin, Emperor of the Night.
"Whatever good that he had left inside of him, she took it." ~ Sigarda