Teferi, Mage of Zhalfir 
Legendary Creature — Human Wizard
$0.74 #4318 1.17 20.0 years
Flash
Creature cards you own that aren't on the battlefield have flash.
Each opponent can cast spells only any time they could cast a sorcery.
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Cards similar to Teferi, Mage of Zhalfir 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.
Teferi, Time Raveler91%
$3.99↑#1132↑1.67↑7.5 years↓
"Each opponent can cast spells only any time they could cast a sorcery."
Rattlechains78%
$0.31↓#10648↓0.13↓10.5 years↓
"Flash"
Gandalf the White75%
$8.60↑#2698↑0.46↓3.3 years↓
"Flash"
Scout's Warning74%
$0.96↑#13858↓0.00↓19.5 years
"The next creature card you play this turn can be played as though it had flash."
Captain Mar-Vell, Space-Born73%
$0.14↓#15727↓0.39↓0.3 years↓
"As long as an opponent has cast a spell this turn, you may cast spells as though they had flash."
Final-Word Phantom72%
$2.41↑#8134↓0.89↓2.7 years↓
"During each opponent's end step, you may cast spells as though they had flash."
+1 more matching line
Sphinx's Decree70%
$0.37↓#23406↓0.79↓8.8 years↓
"Each opponent can't cast instant or sorcery spells during that player's next turn."
High Fae Trickster70%
$4.42↑#838↑0.58↓1.9 years↓
"Flash"
+1 more matching line
Tidal Barracuda70%
$7.80↑#44260.51↓6.5 years↓
"Your opponents can't cast spells during your turn."