Demon of Loathing 
Creature — Demon
$0.61 #8297 0.12 6.6 years
Flying, trample
Whenever this creature deals combat damage to a player, that player sacrifices a creature of their choice.
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Cards similar to Demon of Loathing 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.
Cabal Executioner98%
$0.18↓#26087↓0.29↑23.9 years↑
"Whenever this creature deals combat damage to a player, that player sacrifices a creature of their choice."
Ashling, the Extinguisher98%
$29.66↑#13817↓0.29↑18.1 years↑
"Whenever this card deals combat damage to a player, choose target creature that player controls. The player sacrifices that creature."
Wasitora, Nekoru Queen92%
$0.45↓#11055↓0.68↑9.0 years↑
"Whenever this card deals combat damage to a player, that player sacrifices a creature of their choice. If the player can't, you create a 3/3 black, red, and green Cat Dragon creature token with flying."
+1 more matching line
Demon of Wailing Agonies90%
$1.76↑#14650↓0.62↑11.8 years↑
"As long as you control your commander, this creature gets +2/+2 and has "Whenever this creature deals combat damage to a player, that player sacrifices a creature of their choice.""
Akki Underminer86%
$0.16↓#23152↓0.2121.9 years↑
"Whenever this creature deals combat damage to a player, that player sacrifices a permanent of their choice."
Predatory Nightstalker86%
$0.06↓#31049↓0.50↑28.2 years↑
"When this creature enters, you may have target opponent sacrifice a creature of their choice."
Crude Bent Blade85%
$0.11↓#21663↓0.00↓0.1 years↓
"When this Equipment enters, target opponent sacrifices a creature of their choice."
Chittering Harvester84%
$0.21↓#89410.33↑6.4 years
"Whenever this creature mutates, each opponent sacrifices a creature of their choice."
Witch-king, Bringer of Ruin84%
$11.62↑#74120.31↑3.2 years↓
"Whenever this card attacks, defending player sacrifices a creature with the least power among creatures they control."
Rakdos, Patron of Chaos84%
$4.04↑#2686↑0.48↑2.6 years↓
"Flying, trample"
Destructive Urge84%
$0.54↓#17661↓1.03↑27.9 years↑
"Whenever enchanted creature deals combat damage to a player, that player sacrifices a land of their choice."
O-Kagachi, Vengeful Kami82%
$0.43↓#83730.33↑9.0 years↑
"Flying, trample"
Snapping Thragg80%
$0.09↓#30795↓0.1323.9 years↑
"Whenever this creature deals combat damage to a player, you may have it deal 3 damage to target creature that player controls."
Lingering Death78%
$0.15↓#24839↓0.26↑23.3 years↑
"At the beginning of the end step of enchanted creature's controller, that player sacrifices that creature."
Blind Zealot78%
$0.16↓#21244↓0.29↑15.3 years↑
"Whenever this creature deals combat damage to a player, you may sacrifice it. If you do, destroy target creature that player controls."
Spark Mage78%
$2.52↑#10388↓0.1324.9 years↑
"Whenever this creature deals combat damage to a player, you may have this creature deal 1 damage to target creature that player controls."
Ultimo, Civilization's End78%
$0.23↓#20813↓0.00↓0.2 years↓
"When this card enters, each opponent sacrifices a creature of their choice."
Incinerator of the Guilty78%
$0.40↓#74930.50↑2.6 years↓
"Flying, trample"
Ruthless Deathfang78%
$0.15↓#18044↓0.1811.4 years↑
"Whenever you sacrifice a creature, target opponent sacrifices a creature of their choice."
Rot-Tide Gargantua78%
$0.18↓#16511↓0.204.8 years↓
"When this creature exploits a creature, each opponent sacrifices a creature of their choice."