Meddling Mage {W}{U}
Creature — Human Wizard
As this creature enters, choose a nonland card name.
Spells with the chosen name can't be cast.
click a line to search just that ability, click more to combine them
Cards that do something similar 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.
Voidstone Gargoyle 100%
$0.31#27198
"Spells with the chosen name can't be cast."
+1 more matching line
Council of the Absolute 87%
$0.31#23991
"As this creature enters, choose a noncreature, nonland card name."
+1 more matching line