Misdirection {3}{U}{U}
Instant
You may exile a blue card from your hand rather than pay this spell's mana cost.
Change the target of target spell with a single target.
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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.
Snapback 100%
$0.44#4827
"You may exile a blue card from your hand rather than pay this spell's mana cost."
Imp's Mischief 99%
$6.66#686
"Change the target of target spell with a single target. You lose life equal to that spell's mana value."
Force of Negation 95%
$54.18#266
"If it's not your turn, you may exile a blue card from your hand rather than pay this spell's mana cost."
Divert 87%
$2.45#19881
"Change the target of target spell with a single target unless that spell's controller pays {2}."
Unmask 85%
$20.49#17851
"You may exile a black card from your hand rather than pay this spell's mana cost."
Force of Despair 83%
$8.27#2417
"If it's not your turn, you may exile a black card from your hand rather than pay this spell's mana cost."
Scars of the Veteran 81%
#26689
"You may exile a white card from your hand rather than pay this spell's mana cost."
Reverent Mantra 81%
$21.38#14462
"You may exile a white card from your hand rather than pay this spell's mana cost."
Glittering Wish 81%
$0.26#28638
"You may reveal a multicolored card you own from outside the game and put it into your hand. Exile this card."
Vine Dryad 81%
$1.17#26594
"You may exile a green card from your hand rather than pay this spell's mana cost."
Bounty of the Hunt 81%
#18555
"You may exile a green card from your hand rather than pay this spell's mana cost."
Disrupting Shoal 80%
$14.41#10650
"You may exile a blue card with mana value X from your hand rather than pay this spell's mana cost."