Festive Funeral {4}{B}
Instant
Target creature gets -X/-X until end of turn, where X is the number of cards in your graveyard.
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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.
Nightmarish End 93%
$0.07#26798
"Target creature gets -X/-X until end of turn, where X is the number of cards in your hand."
Flunk 93%
$0.11#26085
"Target creature gets -X/-X until end of turn, where X is 7 minus the number of cards in that creature's controller's hand."
Faerie Fencing 89%
$0.26#7966
"Target creature gets -X/-X until end of turn. That creature gets an additional -3/-3 until end of turn if you controlled a Faerie as you cast this spell."
Necrotic Wound 88%
$0.12#17941
"Target creature gets -X/-X until end of turn, where X is the number of creature cards in your graveyard. If that creature would die this turn, exile it instead."
Take the Fall 88%
$0.13#14685
"Target creature gets -1/-0 until end of turn. It gets -4/-0 until end of turn instead if you control an outlaw."
Fungal Infection 88%
$0.15#15270
"Target creature gets -1/-1 until end of turn. Create a 1/1 green Saproling creature token."
Peppersmoke 87%
$0.25#15398
"Target creature gets -1/-1 until end of turn. If you control a Faerie, draw a card."