Mirror Match {4}{U}{U}
Instant
Cast this spell only during the declare blockers step.
For each creature attacking you or a planeswalker you control, create a token that's a copy of that creature and that's blocking that creature. Exile those tokens at end of combat.
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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 95%
$0.44#3736
"Cast this spell only during the declare blockers step on an opponent's turn."
Melee 87%
$0.33#28941
"Cast this spell only during combat on your turn before blockers are declared."
Silumgar Assassin 85%
$0.31#10647
"Creatures with power greater than this creature's power can't block it."
Labyrinth Raptor 84%
$0.36#12139
"Whenever a creature you control with menace becomes blocked, defending player sacrifices a creature of their choice that's blocking it."