Kaecilius

Black spells you control cast {1} less to cast.
{1}{b}{t}: Destroy target land. Its controller searches their library for a land card that does not share a basic land type with the destroyed land. They put that card onto the battlefield tapped, then shuffle.
{3}{b}{r}: Search your library or graveyard for a card named The Dread Dormammu, reveal it, and put it into your hand. If you searched your library, then shuffle.