Abyssal Horror 
Creature — Horror
$0.44 #24572 0.75 28.0 years
Flying
When this creature enters, target player discards two cards.
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Cards similar to Abyssal Horror 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.
Ebon Dragon98%
$8.17↑#282450.18↓29.5 years↑
"When this creature enters, you may have target opponent discard a card."
Corrupt Court Official98%
$0.13↓#15960↑0.06↓27.5 years
"When this creature enters, target opponent discards a card."
Ravenous Rats98%
$0.15↓#11929↑0.06↓28.3 years
"When this creature enters, target opponent discards a card."
Brutal Nightstalker98%
$0.63↑#31835↓0.16↓28.3 years
"When this creature enters, you may have target opponent discard a card."
Screeching Buzzard96%
$0.04↓#273260.11↓24.0 years↓
"Flying"
Liliana's Specter95%
$0.13↓#9854↑0.27↓16.3 years↓
"When this creature enters, each opponent discards a card."
Nezumi Informant94%
$0.34↓#4740↑0.32↓3.5 years↓
"When this creature enters, each opponent discards a card."
Elderfang Disciple94%
$0.16↓#4582↑0.44↓5.7 years↓
"When this creature enters, each opponent discards a card."
Hecteyes94%
$0.21↓#7077↑0.47↓1.4 years↓
"When this creature enters, each opponent discards a card."
Burglar Rat94%
$0.21↓#2604↑0.33↓8.0 years↓
"When this creature enters, each opponent discards a card."
Cackling Fiend94%
$0.12↓#215210.29↓28.0 years
"When this creature enters, each opponent discards a card."
Rank Rat94%
$0.23↓#204880.36↓0.0 years↓
"When this creature enters, each opponent discards a card."
Stony-Voiced Goblins94%
$0.12↓#16069↑0.51↓0.2 years↓
"When this creature enters, each opponent discards a card."
Virus Beetle94%
$0.14↓#4013↑0.32↓4.7 years↓
"When this creature enters, each opponent discards a card."
Deception92%
$2.66↑#29796↓0.57↓27.5 years
"Target opponent discards two cards."
Mind Rot91%
$0.04↓#12672↑0.32↓29.5 years↑
"Target player discards two cards."
Mournwhelk88%
$0.33↓#251020.56↓19.0 years↓
"When this creature enters, target player discards two cards."
Psychic Symbiont88%
$0.06↓#246840.33↓8.3 years↓
"When this creature enters, target opponent discards a card and you draw a card."
Fell Specter88%
$0.35↓#4911↑0.05↓8.3 years↓
"When this creature enters, target opponent discards a card."
Ozai's Cruelty88%
$0.19↓#13525↑0.35↓0.9 years↓
"this card deals 2 damage to target player. That player discards two cards."