The Water Crystal {2}{U}{U}
Legendary Artifact
Blue spells you cast cost {1} less to cast.
If an opponent would mill one or more cards, they mill that many cards plus four instead.
{4}{U}{U}, {T}: Each opponent mills cards equal to the number of cards in your hand.
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.
Bruvac the Grandiloquent 83%
$45.86#2139
"If an opponent would mill one or more cards, they mill twice that many cards instead."
Longshot, Rebel Bowman 83%
$7.66#3357
"Noncreature spells you cast cost {1} less to cast."
+1 more matching line
Folio of Fancies 82%
$2.34#2803
"{2}{U}, {T}: Each opponent mills cards equal to the number of cards in their hand."