Sphinx's Decree 
Sorcery
$0.29 #23976 0.87 8.6 years
Each opponent can't cast instant or sorcery spells during that player's next turn.
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Cards similar to Sphinx's Decree expected a card that isn't here?
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Azor, the Lawbringer92%
$1.50↑#13518↑0.33↓8.6 years
"When this card enters, each opponent can't cast instant or sorcery spells during that player's next turn."
Abeyance88%
$28.91↑#14343↑1.33↑29.2 years↑
"Until end of turn, target player can't cast instant or sorcery spells, and that player can't activate abilities that aren't mana abilities."
Silence82%
$7.51↑#407↑1.51↑17.1 years↑
"Your opponents can't cast spells this turn."
Tidal Barracuda76%
$7.59↑#4364↑0.63↓6.4 years↓
"Your opponents can't cast spells during your turn."
Hand to Hand74%
$0.49↑#285700.35↓28.9 years↑
"During combat, players can't cast instant spells or activate abilities that aren't mana abilities."
Cease-Fire73%
$0.14↓#240160.47↓24.9 years↑
"Target player can't cast creature spells this turn."
Dragonlord Dromoka72%
$1.94↑#1882↑0.65↓11.4 years↑
"Your opponents can't cast spells during your turn."
Marisi, Breaker of the Coil72%
$9.17↑#4644↑0.76↓7.0 years↓
"Your opponents can't cast spells during combat."
Archon of Valor's Reach71%
$0.36↑#10015↑0.68↓8.2 years
"Players can't cast spells of the chosen type."
Arasta of the Endless Web70%
$0.40↑#1017↑0.25↓6.6 years↓
"Whenever an opponent casts an instant or sorcery spell, create a 1/2 green Spider creature token with reach."
Teferi, Mage of Zhalfir70%
$0.68↑#4329↑1.17↑19.9 years↑
"Each opponent can cast spells only any time they could cast a sorcery."
Voice of Victory70%
$17.12↑#535↑0.951.4 years↓
"Your opponents can't cast spells during your turn."
Psychic Theft70%
$0.26↓#281170.7826.3 years↑
"Target player reveals their hand. You choose an instant or sorcery card from it and exile that card. You may cast that card for as long as it remains exiled. At the beginning of the next end step, if you haven't cast the card, return it to its owner's hand."
Angelic Arbiter70%
$3.30↑#5101↑0.9416.1 years↑
"Each opponent who cast a spell this turn can't attack with creatures."