Whirlwind Denial {2}{U}
Instant
For each spell and ability your opponents control, counter it unless its controller pays {4}.
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.
Parnesse, the Subtle Brush 85%
$0.44#16314
"Whenever you or a permanent you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless that player pays 4 life."
Unsettled Mariner 81%
$5.90#4024
"Whenever you or a permanent you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {1}."