Sultai Ascendancy

At the beginning of your upkeep, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Khans of Tarkir

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Fate Reforged Clash Pack

Khans of Tarkir Promos

At the beginning of your upkeep, look at the top two cards of your library. Put any number of them into your graveyard and the rest back on top of your library in any order.

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.