Astel, Star of Darkness

•Flying
Whenever you cast a black sorcery or instant, target opponent mills a card.
Whenever you cast a blue sorcery or instant target opponent discards a card.

{1}{u}{b} and sacrifice a creature: You may cast target instant or sorcery from your graveyard this turn. If
that spell would be put into your graveyard, exile it instead. Activate only as a sorcery.