Hopeless Nightmare {B}
Enchantment
When this enchantment enters, each opponent discards a card and loses 2 life.
When this enchantment is put into a graveyard from the battlefield, scry 2.
{2}{B}: Sacrifice this enchantment.
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Cards that do something similar 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.
Hopeful Vigil 100%
$0.16#19353
"When this enchantment is put into a graveyard from the battlefield, scry 2."
+1 more matching line
Balemurk Leech 88%
$0.32#7648
"Whenever an enchantment you control enters and whenever you fully unlock a Room, each opponent loses 1 life."
Kroxa, Titan of Death's Hunger 84%
$3.20#4801
"Whenever this card enters or attacks, each opponent discards a card, then each opponent who didn't discard a nonland card this way loses 3 life."
Malboro 82%
$0.19#9387
"When this creature enters, each opponent discards a card, loses 2 life, and exiles the top three cards of their library."