Disruptor Flute {2}
Artifact
Flash
As this artifact enters, choose a card name.
Spells with the chosen name cost {3} more to cast.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.
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.
Sorcerous Spyglass 100%
$0.08#15999
"Activated abilities of sources with the chosen name can't be activated unless they're mana abilities."
+1 more matching line
Petrified Hamlet 100%
$0.67#10982
"Activated abilities of sources with the chosen name can't be activated unless they're mana abilities."
Phyrexian Revoker 98%
$0.32#5262
"Activated abilities of sources with the chosen name can't be activated."
+1 more matching line
Voidstone Gargoyle 98%
$0.31#27198
"Activated abilities of sources with the chosen name can't be activated."
+2 more matching lines
Council of the Absolute 88%
$0.31#23991
"Spells with the chosen name you cast cost {2} less to cast."
+1 more matching line