Prognostic Sphinx 
Creature — Sphinx
$0.15 #10410 0.38 12.9 years
Flying
Discard a card: This creature gains hexproof until end of turn. Tap it.
Whenever this creature attacks, scry 3.
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Cards similar to Prognostic Sphinx 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.
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"Discard a card: This creature gains hexproof until end of turn. Tap it."
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"Discard a card: Switch this creature's power and toughness until end of turn."
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"Discard a card: Regenerate this creature."
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"Flying"
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"Discard a card: Until end of turn, this card becomes a Human with base power and toughness 1/1, loses all abilities, and gains hexproof. It can't be blocked this turn."
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"Discard a card: This creature gains shadow until end of turn."
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"Discard a card: This creature gets +1/+1 until end of turn."
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"Discard a card: Transform this creature. Activate only once each turn."
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"Whenever this creature attacks, scry 1."
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"Discard a card: This creature gets +1/+1 until end of turn."