Curse of Exhaustion 
Enchantment — Aura Curse
$0.34 #8982 1.25 14.6 years
Enchant player
Enchanted player can't cast more than one spell each turn.
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Cards similar to Curse of Exhaustion expected a card that isn't here?
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Rule of Law90%
$0.52↑#3430↑1.47↑22.9 years↑
"Each player can't cast more than one spell each turn."
Eidolon of Rhetoric90%
$0.46↑#3456↑1.2812.3 years↓
"Each player can't cast more than one spell each turn."
Arcane Laboratory90%
$0.50↑#97041.49↑27.9 years↑
"Each player can't cast more than one spell each turn."
High Noon88%
$4.28↑#76210.89↓2.4 years↓
"Each player can't cast more than one spell each turn."
Deafening Silence87%
$1.08↑#1959↑1.48↑6.9 years↓
"Each player can't cast more than one noncreature spell each turn."
Archon of Emeria84%
$0.95↑#2098↑1.295.9 years↓
"Each player can't cast more than one spell each turn."
Curse of Shaken Faith81%
$0.30↓#89670.50↓4.9 years↓
"Enchant player"
Phyrexian Censor80%
$0.30↓#4422↑1.09↓3.4 years↓
"Each player can't cast more than one non-Phyrexian spell each turn."
Moderation78%
$0.25↓#15166↓0.31↓5.3 years↓
"You can't cast more than one spell each turn."