Phyrexian Censor 
Creature — Phyrexian Wizard
$0.30 #4422 1.09 3.4 years
Each player can't cast more than one non-Phyrexian spell each turn.
Non-Phyrexian creatures enter tapped.
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Cards similar to Phyrexian Censor 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.
Rule of Law91%
$0.52↑#3430↑1.47↑22.9 years↑
"Each player can't cast more than one spell each turn."
Eidolon of Rhetoric91%
$0.46↑#3456↑1.28↑12.3 years↑
"Each player can't cast more than one spell each turn."
Arcane Laboratory91%
$0.50↑#9704↓1.49↑27.9 years↑
"Each player can't cast more than one spell each turn."
Archon of Emeria89%
$0.95↑#2098↑1.29↑5.9 years↑
"Each player can't cast more than one spell each turn."
Deafening Silence88%
$1.08↑#1959↑1.48↑6.9 years↑
"Each player can't cast more than one noncreature spell each turn."
High Noon83%
$4.28↑#7621↓0.89↓2.4 years
"Each player can't cast more than one spell each turn."
Curse of Exhaustion80%
$0.34↑#8982↓1.25↑14.6 years↑
"Enchanted player can't cast more than one spell each turn."
False Floor74%
$0.25↓#19011↓0.06↓4.4 years
"Creatures enter tapped."
Uphill Battle74%
$5.50↑#14914↓0.67↓26.9 years↑
"Creatures played by your opponents enter tapped."
Ethersworn Canonist72%
$1.95↑#2794↑1.32↑17.9 years↑
"Each player who has cast a nonartifact spell this turn can't cast additional nonartifact spells."
Moderation70%
$0.25↓#15166↓0.31↓5.3 years↑
"You can't cast more than one spell each turn."
Imposing Sovereign70%
$0.39↑#12263↓0.79↓13.1 years↑
"Creatures your opponents control enter tapped."
Urabrask the Hidden70%
$4.08↑#1767↑0.70↓15.3 years↑
"Creatures your opponents control enter tapped."
Kinjalli's Sunwing70%
$0.87↑#3279↑0.70↓8.9 years↑
"Creatures your opponents control enter tapped."