Ornax, Rebirther

({p/b} can be paid with {b} or 2 life)
{t}: Put the top four cards of your library into your graveyard, return a creature from you graveyard to the battlefield, it is a zombie in addition to it's other types.
{p/b}: exile Ornax, Rebirther, return him to the battlefield under your control tapped.
You lose 2 life.