Tower of Murmurs {4}
Artifact
{8}, {T}: Target player mills eight cards.
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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.
Grindstone 90%
#6313
"{3}, {T}: Target player mills two cards. If two cards that share a color were milled this way, repeat this process."
Keening Stone 88%
$0.42#9175
"{5}, {T}: Target player mills X cards, where X is the number of cards in that player's graveyard."