Painwracker Oni 
Creature — Demon Spirit
$0.18 #20239 0.00 22.1 years
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
At the beginning of your upkeep, sacrifice a creature if you don't control an Ogre.
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Cards similar to Painwracker Oni 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.
Demonic Appetite88%
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"At the beginning of your upkeep, sacrifice a creature."
Abhorrent Overlord86%
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"At the beginning of your upkeep, sacrifice a creature."
Oni Possession85%
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"At the beginning of your upkeep, sacrifice a creature."
Devouring Strossus84%
$0.81↑#213570.28↑26.0 years↑
"At the beginning of your upkeep, sacrifice a creature."
Demonic Taskmaster84%
$0.21↑#9646↑0.17↑14.5 years↓
"At the beginning of your upkeep, sacrifice a creature other than this creature."
Desecration Elemental82%
$5.59↑#11843↑0.56↑22.4 years
"Fear"
Scourge of Numai81%
$0.26↑#29588↓0.12↑21.7 years
"At the beginning of your upkeep, you lose 2 life if you don't control an Ogre."
Lord of the Pit81%
$0.40↑#13167↑0.0733.2 years↑
"At the beginning of your upkeep, sacrifice a creature other than this creature. If you can't, this creature deals 7 damage to you."
Gutwrencher Oni80%
$0.15↓#25701↓0.0522.1 years
"At the beginning of your upkeep, discard a card if you don't control an Ogre."
Daemogoth Woe-Eater78%
$0.31↑#7599↑0.27↑5.5 years↓
"At the beginning of your upkeep, sacrifice a creature."
Phyrexian Soulgorger78%
$6.72↑#5999↑0.33↑20.2 years↓
"Cumulative upkeep—Sacrifice a creature."
Apocalypse Demon77%
$0.25↑#15742↑0.009.3 years↓
"At the beginning of your upkeep, tap this creature unless you sacrifice another creature."
Liege of the Pit76%
$0.75↑#169570.0020.0 years↓
"At the beginning of your upkeep, sacrifice a creature other than this creature. If you can't, this creature deals 7 damage to you."
Yukora, the Prisoner74%
$0.49↑#176000.22↑21.7 years
"When this card leaves the battlefield, sacrifice all non-Ogre creatures you control."
Smothering Abomination72%
$0.33↑#3877↑0.24↑11.0 years↓
"At the beginning of your upkeep, sacrifice a creature."
Shadowborn Demon72%
$0.46↑#168290.0713.3 years↓
"At the beginning of your upkeep, if there are fewer than six creature cards in your graveyard, sacrifice a creature."
Woebringer Demon72%
$0.26↑#219340.44↑21.0 years↓
"At the beginning of each player's upkeep, that player sacrifices a creature of their choice. If the player can't, sacrifice this creature."
Shisato, Whispering Hunter71%
$0.58↑#213610.79↑22.1 years
"At the beginning of your upkeep, sacrifice a Snake."
Contamination70%
$4.97↑#7946↑1.69↑28.0 years↑
"At the beginning of your upkeep, sacrifice this enchantment unless you sacrifice a creature."
Squeaking Pie Sneak70%
$0.16↓#28538↓0.0619.0 years↓
"Fear"