Sorcerous Spyglass {2}
Artifact
As this artifact enters, look at an opponent's hand, then choose any card name.
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.
Disruptor Flute 100%
$1.49#7633
"Activated abilities of sources with the chosen name can't be activated unless they're mana abilities."
+1 more matching line
Pithing Needle 100%
$0.58#6390
"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."