Shrieking Grotesque 

Creature — Gargoyle
$0.05 #31541 0.17 20.7 years
Flying
When this creature enters, if
was spent to cast it, target player discards a card.
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Cards similar to Shrieking Grotesque 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.
Mournwhelk88%
$0.33↑#25102↑0.56↑19.0 years↓
"When this creature enters, target player discards two cards."
Arcane Omens84%
$0.16↑#274820.47↑0.5 years↓
"Target player discards X cards, where X is the number of colors of mana spent to cast this spell."
Abyssal Horror82%
$0.44↑#24572↑0.75↑28.0 years↑
"When this creature enters, target player discards two cards."
Strands of Undeath82%
$0.18↑#21945↑0.1221.0 years
"When this Aura enters, target player discards two cards."
Aspect of Lamprey82%
$0.14↑#17646↑0.41↑6.7 years↓
"When this Aura enters, target opponent discards two cards."
Ebon Dragon82%
$8.17↑#282450.1829.5 years↑
"When this creature enters, you may have target opponent discard a card."
River's Grasp80%
$0.20↑#304430.2518.5 years↓
"If
was spent to cast this spell, return up to one target creature to its owner's hand. If
was spent to cast this spell, target player reveals their hand, you choose a nonland card from it, then that player discards that card."
Corrupt Court Official80%
$0.13↑#15960↑0.06↓27.5 years↑
"When this creature enters, target opponent discards a card."
Ravenous Rats80%
$0.15↑#11929↑0.06↓28.3 years↑
"When this creature enters, target opponent discards a card."
Brutal Nightstalker80%
$0.63↑#318350.1628.3 years↑
"When this creature enters, you may have target opponent discard a card."
Bloodhusk Ritualist80%
$0.24↑#18213↑0.85↑16.7 years↓
"When this creature enters, target opponent discards a card for each time it was kicked."