Davriel Cane, Diabolist

+1: Davriel Cane, Diabolist can be your commander. Target opponent reveals their hand unless they discard an instant or sorcery card.
-3: Search your library for a Demon creature card, exile it, and shuffle your library. Davriel gains all activated abilities of that creature.
-7: Exile all instant and sorcery cards from each opponent's graveyard. You may cast those cards without paying their mana cost until end of turn.