Curse of Exhaustion 
Enchantment — Aura Curse
$0.38 #9065 1.40 14.7 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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Eidolon of Rhetoric90%
$0.55↑#3570↑1.56↑12.5 years↓
"Each player can't cast more than one spell each turn."
Rule of Law90%
$0.42↑#3469↑1.81↑23.0 years↑
"Each player can't cast more than one spell each turn."
Arcane Laboratory90%
$0.52↑#98321.68↑28.0 years↑
"Each player can't cast more than one spell each turn."
High Noon88%
$4.44↑#78451.24↓2.5 years↓
"Each player can't cast more than one spell each turn."
Deafening Silence87%
$1.12↑#1972↑1.71↑7.0 years↓
"Each player can't cast more than one noncreature spell each turn."
Archon of Emeria84%
$1.04↑#2143↑1.59↑6.1 years↓
"Each player can't cast more than one spell each turn."
Curse of Shaken Faith81%
$0.31↓#90290.59↓5.1 years↓
"Enchant player"
Phyrexian Censor80%
$0.35↓#4553↑1.16↓3.5 years↓
"Each player can't cast more than one non-Phyrexian spell each turn."
Moderation78%
$0.27↓#15462↓0.39↓5.5 years↓
"You can't cast more than one spell each turn."