Crog, Vicious Abomination

Flying, Deathtouch, Swampwalk, Forestwalk
{x}{b/g}{b/g}{t}: Crog, Vicious Abomination deals X
damage to each creature opponents control,
where X is the number of creatures that entered
the graveyard from anywhere this turn.
{2}{b}{b}: Search your library for a creature card, shuffle your library and put that card on top.