Cunning Rhetoric {2}{B}
Enchantment
Whenever an opponent attacks you and/or one or more planeswalkers you control, exile the top card of that player's library. You may play that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast 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.
Nathan Drake, Treasure Hunter 88%
$4.72#14996
"Whenever this card attacks, exile the top card of each player's library. You may cast a spell from among those cards."
Etali, Primal Storm 88%
$0.43#260
"Whenever this card attacks, exile the top card of each player's library, then you may cast any number of spells from among those cards without paying their mana costs."
Reno and Rude 85%
$0.23#12801
"Whenever this card deals combat damage to a player, exile the top card of that player's library. Then you may sacrifice another creature or artifact. If you do, you may play the exiled card this turn, and mana of any type can be spent to cast it."
Nashi, Moon Sage's Scion 84%
$3.75#1949
"Whenever this card deals combat damage to a player, exile the top card of each player's library. Until end of turn, you may play one of those cards. If you cast a spell this way, pay life equal to its mana value rather than paying its mana cost."
Mezzio Mugger 84%
$0.32#12165
"Whenever this creature attacks, exile the top card of each player's library. You may play those cards this turn, and you may spend mana as though it were mana of any color to cast those spells."
Tempered in Solitude 83%
$0.26#12038
"Whenever a creature you control attacks alone, exile the top card of your library. You may play that card this turn."
Daredevil, Fearless Fighter 83%
$3.56#19255
"Whenever this card attacks, exile the top card of your library. this card deals damage to you equal to that card's mana value. You may play it this turn."
Robber of the Rich 83%
$1.52#10249
"Whenever this creature attacks, if defending player has more cards in hand than you, exile the top card of their library. During any turn you attacked with a Rogue, you may cast that card and you may spend mana as though it were mana of any color to cast that spell."
Laelia, the Blade Reforged 82%
$0.30#1297
"Whenever this card attacks, exile the top card of your library. You may play that card this turn."
Lightning, Security Sergeant 81%
$0.43#10387
"Whenever this card deals combat damage to a player, exile the top card of your library. You may play that card for as long as you control this card."