When Diabellstar enters the battlefield you may search your library for an instant or sorcery card and exile it. You may cast that card as long as it remains in exile.

When a spell or ability an opponent controls destroys Diabellstar or causes you to discard Diabellstar, you may discard a card or sacrifice a permanent, if you do return Diabellstar from your graveyard to the battlefield.

Evoke — Exile 2 black or red cards from your hand.