Black Sun's Nadir

( {p/r} can be paid with either {r} or {1} and 1 life.)
If {r}{w} was spent to cast this spell, create a 3/3 colorless Golem and a 1/1 colorless Myr artifact creature token. If {g}{u} was spent to cast this spell,
you draw a card and gain 1 life for each creature
you control. If at least four black mana was spent
to cast this spell, put all creature cards from target opponent's graveyard onto the battlefield under
your control instead.