Silence {W}
Instant
Your opponents can't cast spells this turn.
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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.
Jennifer Walters // The Sensational She-Hulk 97%
$14.40#12167
"Your opponents can't cast spells during your turn."
Grand Abolisher 90%
$17.65#250
"During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments."
Myrel, Shield of Argive 90%
$17.67#1521
"During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments."
Teferi, Time Raveler 86%
$7.25#1139
"Each opponent can cast spells only any time they could cast a sorcery."
Teferi, Mage of Zhalfir 86%
$3.05#4358
"Each opponent can cast spells only any time they could cast a sorcery."
Inventive Iteration // Living Breakthrough 85%
$0.30#9276
"Whenever you cast a spell, your opponents can't cast spells with the same mana value as that spell until your next turn."
Siren's Call 84%
$0.19#21554
"Cast this spell only during an opponent's turn, before attackers are declared."
Godsend 83%
$3.67#7903
"Your opponents can't cast spells with the same name as a card exiled with this card."