Gulphed, the Dark

{t}, Sacrifice another creature: Return target
creature card from your graveyard to the
battlefield under your control. At the beginning
of the next endstep, sacrifice the returned card
and return the card sacrificed first from your
graveyard to the battlefield under your control.
You lose 4 life.
{b}{b}{b}{b}, Pay 4 life: Untap Gulphed, the Dark.