Laveau, Rising Lich

{2}{u}, Sacrifice a creature: reveal the top four cards of your library, your opponent separate
them into two piles, put one into your hand the other into the graveyard.
{2}{b}, Sacrifice a creature: Exile target creature card from a graveyard. Create a token that's
a copy of it, except it's a 4/4 black Zombie.
{2}{g}, Sacrifice a creature: Return a card from a graveyard to your hand.