Spontaneous Mutation {U}
Enchantment — Aura
Flash
Enchant creature
Enchanted creature gets -X/-0, where X is the number of cards in your graveyard.
click a line to search just that ability, click more to combine them
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.
Fear of Death 100%
$0.20#22421
"Enchanted creature gets -X/-0, where X is the number of cards in your graveyard."
Disturbing Conversion 99%
$0.17#21250
"Enchanted creature gets -X/-0, where X is the number of cards in its controller's graveyard."
+1 more matching line
Death's Approach 96%
$0.18#20771
"Enchanted creature gets -X/-X, where X is the number of creature cards in its controller's graveyard."
Kagemaro's Clutch 91%
$0.16#30130
"Enchanted creature gets -X/-X, where X is the number of cards in your hand."
+1 more matching line
So Tiny 80%
$0.08#24447
"Enchanted creature gets -2/-0. It gets -6/-0 instead as long as its controller has seven or more cards in their graveyard."
+1 more matching line