Anowon, the Ruin Sage {3}{B}{B}
Legendary Creature — Vampire Shaman
At the beginning of your upkeep, each player sacrifices a non-Vampire creature of their choice.
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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.
Kuon, Ogre Ascendant // Kuon's Essence 83%
$1.15#22177
"At the beginning of each player's upkeep, that player sacrifices a creature of their choice."
Woebringer Demon 82%
$0.25#20982
"At the beginning of each player's upkeep, that player sacrifices a creature of their choice. If the player can't, sacrifice this creature."