Deathbringer, The Death Bat

Flying, deathtouch, lifelink
Deathbringers power and toughness is equal to
the number of cards in all graveyards.
{1}{b},{t}: All players put the top card of their
library into their graveyard.
{2}{b}: Deathbringer fights another creature.
It flies through the night, draining living things dry.