Woebringer Demon 


Creature — Demon
Flying
At the beginning of each player's upkeep, that player sacrifices a creature of their choice. If the player can't, sacrifice this creature.
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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 99%
$1.15#22177
"At the beginning of each player's upkeep, that player sacrifices a creature of their choice."
Ruthless Winnower 89%
$1.82#7107
"At the beginning of each player's upkeep, that player sacrifices a non-Elf creature of their choice."
Call to the Grave 87%
$2.55#12778
"At the beginning of each player's upkeep, that player sacrifices a non-Zombie creature of their choice."
Sheoldred, Whispering One 87%
$19.92#701
"At the beginning of each opponent's upkeep, that player sacrifices a creature of their choice."
Defiler of Souls 86%
$2.06#22453
"At the beginning of each player's upkeep, that player sacrifices a monocolored creature of their choice."
+1 more matching line
Anowon, the Ruin Sage 82%
$2.69#5029
"At the beginning of your upkeep, each player sacrifices a non-Vampire creature of their choice."
Braids, Cabal Minion 82%
$1.10#5143
"At the beginning of each player's upkeep, that player sacrifices an artifact, creature, or land of their choice."
Innocent Traveler // Malicious Invader 82%
$0.10#20445
"At the beginning of your upkeep, any opponent may sacrifice a creature of their choice. If no one does, transform this creature."
Eldrazi Monument 81%
$9.84#1430
"At the beginning of your upkeep, sacrifice a creature. If you can't, sacrifice this artifact."
Doomgape 80%
$0.21#18938
"At the beginning of your upkeep, sacrifice a creature. You gain life equal to that creature's toughness."
Demonic Taskmaster 80%
$0.25#9488
"At the beginning of your upkeep, sacrifice a creature other than this creature."