Scry

Cards with the Scry keyword or scry-like top-of-library filtering, where you peek at the top one or more cards and send any you don't want to the bottom. Includes cheap spells like Preordain, Serum Visions, and Opt, repeatable engines like Crystal Ball, Sigiled Starfish, and Jace's Sanctum, and upkeep smoothers like Thassa, God of the Sea. Distinct from card_advantage.cantrip, which requires the spell to actually replace itself with a card draw; many scry effects do not draw at all. Also distinct from topdeck.library_manipulation reorderings that place cards on top rather than bottoming them, and from surveil effects that send cards to the graveyard instead of the bottom of the library.