Rapid Fire {3}{W}
Instant
Cast this spell only before blockers are declared.
Target creature gains first strike until end of turn. If it doesn't have rampage, that creature gains rampage 2 until end of turn. (Whenever the creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.)
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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.
Illusionist's Gambit 93%
$0.44#3736
"Cast this spell only during the declare blockers step on an opponent's turn."
Melee 88%
$0.33#28941
"Cast this spell only during combat on your turn before blockers are declared."
Berserker's Frenzy 81%
$1.45#6973
"Cast this spell only before combat or during combat before blockers are declared."
Tromokratis 80%
$0.22#4862
"this card can't be blocked unless all creatures defending player controls block it."