Illusionist's Gambit {2}{U}{U}
Instant
Cast this spell only during the declare blockers step on an opponent's turn.
Remove all attacking creatures from combat and untap them. After this phase, there is an additional combat phase. Each of those creatures attacks that combat if able. They can't attack you or planeswalkers you control that combat.
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Cards that do something similar expected a card that isn't here?
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Melee 91%
$0.33#28941
"Cast this spell only during combat on your turn before blockers are declared."
+1 more matching line
Disharmony 90%
#27432
"Cast this spell only during combat before blockers are declared."
+1 more matching line
Tromokratis 83%
$0.22#4862
"this card can't be blocked unless all creatures defending player controls block it."
Berserker's Frenzy 82%
$1.45#6973
"Cast this spell only before combat or during combat before blockers are declared."