Nightbird's Clutches {1}{R}
Sorcery
Up to two target creatures can't block this turn.
Flashback {3}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
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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.
Bellowing Bruiser // Beat a Path 100%
$0.14#19832
"Up to two target creatures can't block this turn."
Abandon the Post 100%
$0.19#17009
"Up to two target creatures can't block this turn."
+1 more matching line
Blow Your House Down 94%
$0.12#23125
"Up to three target creatures can't block this turn. Destroy any of them that are Walls."