Invert the Skies 
Instant
$0.20 #25223 0.21 18.1 years
Creatures your opponents control lose flying until end of turn if 
was spent to cast this spell, and creatures you control gain flying until end of turn if 
was spent to cast this spell. (Do both if was spent.)
was spent to cast this spell, and creatures you control gain flying until end of turn if was spent to cast this spell. (Do both if was spent.)Click a line or tag to filter
Cards similar to Invert the Skies 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.
Archetype of Imagination82%
$0.62↑#1830↑0.59↑12.6 years↓
"Creatures your opponents control lose flying and can't have or gain flying."