Dark-Dweller Oracle

Text:

, Sacrifice a creature: Exile the top card of your library. You may play that card this turn. (You still pay its costs. You can play a land this way only if you have an available land play remaining.)

Rulings:

• 7/13/2018 Dark-Dweller Oracle doesn’t change when you can cast the exiled card. For example, if you exile a sorcery card, you can cast it only during your main phase when the stack is empty. If you exile a land card, you can play it only during your main phase and only if you have an available land play remaining.
• 7/13/2018 Casting an exiled card causes it to leave exile. You can’t cast it multiple times.
• 7/13/2018 If you don’t cast the exiled card, it remains in exile.
• 7/13/2018 You can sacrifice Dark-Dweller Oracle to pay the cost for its own ability.