Conjurer's Ban 

Sorcery
$0.21 #28526 0.22 20.6 years
Choose a card name. Until your next turn, spells with the chosen name can't be cast and lands with the chosen name can't be played.
Draw a card.
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Cards similar to Conjurer's Ban 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.
Null Chamber88%
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"Spells with the chosen names can't be cast and lands with the chosen names can't be played."
Failure // Comply83%
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"Choose a card name. Until your next turn, your opponents can't cast spells with the chosen name."
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"Your opponents can't cast spells with the chosen name."
Alhammarret, High Arbiter82%
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"Your opponents can't cast spells with the chosen name ."