Interpret the Signs {5}{U}
Sorcery
Scry 3, then reveal the top card of your library. Draw cards equal to that card's mana value. (To scry 3, look at the top three cards of your library, then put any number of them on the bottom and the rest on top in any order.)
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Track Down 99%
$0.21#15316
"Scry 3, then reveal the top card of your library. If it's a creature or land card, draw a card."
Nissa's Revelation 96%
$0.37#17461
"Scry 5, then reveal the top card of your library. If it's a creature card, you draw cards equal to its power and you gain life equal to its toughness."
Elven Farsight 92%
$0.18#5802
"Scry 3, then you may reveal the top card of your library. If a creature card is revealed this way, draw a card."
Thrasios, Triton Hero 91%
#2488
"{4}: Scry 1, then reveal the top card of your library. If it's a land card, put it onto the battlefield tapped. Otherwise, draw a card."