Arcane Laboratory 
Enchantment
$0.50 #9704 1.49 27.9 years
Each player can't cast more than one spell each turn.
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Rule of Law100%
$0.52↑#3430↑1.4722.9 years↓
"Each player can't cast more than one spell each turn."
Eidolon of Rhetoric100%
$0.46↓#3456↑1.28↓12.3 years↓
"Each player can't cast more than one spell each turn."
Deafening Silence97%
$1.08↑#1959↑1.486.9 years↓
"Each player can't cast more than one noncreature spell each turn."
High Noon96%
$4.28↑#7621↑0.89↓2.4 years↓
"Each player can't cast more than one spell each turn."
Archon of Emeria94%
$0.95↑#2098↑1.29↓5.9 years↓
"Each player can't cast more than one spell each turn."
Phyrexian Censor91%
$0.30↓#4422↑1.09↓3.4 years↓
"Each player can't cast more than one non-Phyrexian spell each turn."
Curse of Exhaustion90%
$0.34↓#89821.25↓14.6 years↓
"Enchanted player can't cast more than one spell each turn."
Ethersworn Canonist84%
$1.95↑#2794↑1.32↓17.9 years↓
"Each player who has cast a nonartifact spell this turn can't cast additional nonartifact spells."
Moderation81%
$0.25↓#15166↓0.31↓5.3 years↓
"You can't cast more than one spell each turn."
Delightful Discovery74%
$0.26↓#15895↓0.21↓1.8 years↓
"This spell costs 
less to cast for each spell your opponents have cast this turn."
less to cast for each spell your opponents have cast this turn."
Yawgmoth's Agenda72%
$0.32↓#26911↓0.22↓25.9 years↓
"You can't cast more than one spell each turn."
Damping Sphere72%
$0.67↑#4998↑1.12↓8.4 years↓
"Each spell a player casts costs more to cast for each other spell that player has cast this turn."
more to cast for each other spell that player has cast this turn."