Sacred Guide {W}
Creature — Human Cleric
{1}{W}, Sacrifice this creature: Reveal cards from the top of your library until you reveal a white card. Put that card into your hand and exile all other cards revealed this way.
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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.