Sigil of the Sacrament

{1}, Sacrifice Sigil of the Sacrament: Target player reveals cards from the top of their library until
that player reveals a creature card, puts that card
onto the battlefield, then exiles the rest.
{2}, {t}: Target player sacrifices a nonlegendary
black creature. That player reveals cards from
the top of their library until they reveal a creature
card, puts that card into their hand, then exiles
the rest.