Liliana's Caress {1}{B}
Enchantment
Whenever an opponent discards a card, that player loses 2 life.
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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.
The Death of Gwen Stacy 85%
$0.38#9743
"Each player may discard a card. Each player who doesn't loses 3 life."
Strongarm Tactics 84%
$0.36#23992
"Each player discards a card. Then each player who didn't discard a creature card this way loses 4 life."
Psychic Purge 82%
#28115
"When a spell or ability an opponent controls causes you to discard this card, that player loses 5 life."
Death Cloud 80%
$3.78#10152
"Each player loses X life, discards X cards, sacrifices X creatures of their choice, then sacrifices X lands of their choice."