Painwracker Oni 
Creature — Demon Spirit
$0.15 #19907 0.00 21.9 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%
$0.10↓#25436↓0.44↑16.4 years↓
"At the beginning of your upkeep, sacrifice a creature."
Abhorrent Overlord86%
$0.49↑#5925↑0.29↑13.0 years↓
"At the beginning of your upkeep, sacrifice a creature."
Oni Possession85%
$0.15#26801↓0.12↑21.9 years
"At the beginning of your upkeep, sacrifice a creature."
Devouring Strossus84%
$0.81↑#211810.0025.9 years↑
"At the beginning of your upkeep, sacrifice a creature."
Demonic Taskmaster84%
$0.24↑#9559↑0.50↑14.3 years↓
"At the beginning of your upkeep, sacrifice a creature other than this creature."
Scourge of Numai81%
$0.27↑#29230↓0.0721.6 years
"At the beginning of your upkeep, you lose 2 life if you don't control an Ogre."
Lord of the Pit81%
$0.42↑#13006↑0.41↑33.1 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."
Desecration Elemental81%
$5.81↑#11681↑0.25↑22.3 years
"Fear"
Gutwrencher Oni80%
$0.18↑#25308↓0.31↑21.9 years
"At the beginning of your upkeep, discard a card if you don't control an Ogre."
Daemogoth Woe-Eater78%
$0.25↑#7426↑0.59↑5.4 years↓
"At the beginning of your upkeep, sacrifice a creature."
Phyrexian Soulgorger78%
$7.03↑#5950↑0.12↑20.1 years↓
"Cumulative upkeep—Sacrifice a creature."
Apocalypse Demon77%
$0.27↑#15704↑0.53↑9.1 years↓
"At the beginning of your upkeep, tap this creature unless you sacrifice another creature."
Liege of the Pit76%
$0.76↑#166040.0019.9 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↑#173580.21↑21.6 years
"When this card leaves the battlefield, sacrifice all non-Ogre creatures you control."
Phobian Phantasm74%
$0.13↓#31197↓0.57↑20.1 years↓
"Flying; fear"
Smothering Abomination72%
$0.33↑#3833↑0.28↑10.9 years↓
"At the beginning of your upkeep, sacrifice a creature."
Shadowborn Demon72%
$0.46↑#165320.0513.1 years↓
"At the beginning of your upkeep, if there are fewer than six creature cards in your graveyard, sacrifice a creature."
Shisato, Whispering Hunter71%
$0.53↑#211370.67↑21.9 years
"At the beginning of your upkeep, sacrifice a Snake."
Squeaking Pie Sneak71%
$0.15#28027↓0.0018.9 years↓
"Fear"
Contamination70%
$4.94↑#7916↑1.50↑27.9 years↑
"At the beginning of your upkeep, sacrifice this enchantment unless you sacrifice a creature."