Zamarth, the Gravelord

Flying, Deathtouch
When Zamarth enters the battlefield, put the top
two cards of your library into your graveyard.
Whenever a creature card is put into your
graveyard, you may search your library for a
creature card with a converted mana cost of X or
less, where X is the number of creature cards in
your graveyard, and put it onto the battlefield
tapped.