Scavir, The Evolved

Flying, deathtouch
Evolution - {1}{u}{r}, {t}: Target creature you
control becomes a 1/1 colorless artifact creature
with no abilities except "{t}: Add {c}." This
creature gets a +1/+1 counter.
{x}{x}{w}{b}{g}, {t}: Return target creature from
your graveyard with mana value X or less to the
battlefield tapped as a 2/2 black zombie with no abilities.