Celestial Reunion {X}{G}
Sorcery
As an additional cost to cast this spell, you may choose a creature type and behold two creatures of that type.
Search your library for a creature card with mana value X or less, reveal it, put it into your hand, then shuffle. If this spell's additional cost was paid and the revealed card is the chosen type, put that card onto the battlefield instead of putting it into your hand.
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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.
Chord of Calling 86%
$6.35#528
"Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle."
Nature's Rhythm 86%
$4.97#1000
"Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle."
Eldritch Evolution 86%
$3.90#728
"Search your library for a creature card with mana value X or less, where X is 2 plus the sacrificed creature's mana value. Put that card onto the battlefield, then shuffle. Exile this card."
Green Sun's Zenith 81%
$28.51#549
"Search your library for a green creature card with mana value X or less, put it onto the battlefield, then shuffle. Shuffle this card into its owner's library."