Umbilicus {4}
Artifact
At the beginning of each player's upkeep, that player may pay 2 life. If they don't, they return a permanent they control to its owner's hand.
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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.
Master of Death 85%
$0.23#6926
"At the beginning of your upkeep, if this card is in your graveyard, you may pay 1 life. If you do, return it to your hand."