Carnophage {B}
Creature — Zombie
At the beginning of your upkeep, tap this creature unless you pay 1 life.
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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.
Sangrophage 98%
$0.05#29378
"At the beginning of your upkeep, tap this creature unless you pay 2 life."
Heavyweight Demolisher 96%
$0.08#24141
"At the beginning of your upkeep, tap this creature unless you pay {3}."
Apocalypse Demon 94%
$0.28#15673
"At the beginning of your upkeep, tap this creature unless you sacrifice another creature."
Demonic Hordes 92%
#24808
"At the beginning of your upkeep, unless you pay {B}{B}{B}, tap this creature and sacrifice a land of an opponent's choice."
Devouring Sugarmaw // Have for Dinner 90%
$0.24#20794
"At the beginning of your upkeep, you may sacrifice an artifact, enchantment, or token. If you don't, tap this creature."
Minion of Leshrac 84%
#23516
"At the beginning of your upkeep, this creature deals 5 damage to you unless you sacrifice a creature other than this creature. If this creature deals damage to you this way, tap it."
Narcolepsy 80%
$0.21#18503
"At the beginning of each upkeep, if enchanted creature is untapped, tap it."