Divergent Equation {X}{X}{U}
Instant
Return up to X target instant and/or sorcery cards from your graveyard to your hand.
Exile Divergent Equation.
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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.
Shreds of Sanity 82%
$0.18#15004
"Return up to one target instant card and up to one target sorcery card from your graveyard to your hand, then discard a card. Exile this card."