Ebony Owl Netsuke {2}
Artifact
At the beginning of each opponent's upkeep, if that player has seven or more cards in hand, this artifact deals 4 damage to that player.
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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.
Misers' Cage 85%
$1.73#19428
"At the beginning of each opponent's upkeep, if that player has five or more cards in hand, this artifact deals 2 damage to that player."