Borne Upon a Wind {1}{U}
Instant
You may cast spells this turn as though they had flash.
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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.
Complete the Circuit 96%
$0.35#9059
"You may cast sorcery spells this turn as though they had flash."
Quicken 90%
$0.32#5885
"The next sorcery spell you cast this turn can be cast as though it had flash."
+1 more matching line
Sabin, Master Monk 86%
$0.19#11576
"You may cast this card from your graveyard using its blitz ability."
Tenacious Underdog 86%
$0.38#10893
"You may cast this card from your graveyard using its blitz ability."
Heliod, the Radiant Dawn // Heliod, the Warped Eclipse 86%
$2.56#3209
"You may cast spells as though they had flash."
Ward of Lights 85%
$0.25#21777
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Relic Ward 85%
$0.14#27571
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Soar 85%
$0.08#30872
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Grave Servitude 85%
$0.12#29813
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."