Naga Oracle

When Naga Oracle enters, surveil 3. (Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Amonkhet Remastered

When Naga Oracle enters the battlefield, look at the top three cards of your library. Put any number of them into your graveyard and the rest back on top of your library in any order.

"All questions will be answered during the Hour of Revelation."

Amonkhet

When you surveil, you may put all the cards you look at back on top of your library, you may put all of those cards into your graveyard, or you may put some of those cards on top and the rest of them into your graveyard.