Graven Abomination 
Artifact Creature — Horror
Whenever this creature attacks, exile target card from defending player's 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.
Ashnod's Harvester 98%
$0.09#20231
"Whenever this creature attacks, exile target card from a graveyard."
Disruptor Wanderglyph 98%
$0.16#22419
"Whenever this creature attacks, exile target card from an opponent's graveyard."
Underworld Sentinel 90%
$0.32#15996
"Whenever this creature attacks, exile target creature card from your graveyard."
Sauron, the Necromancer 84%
$0.38#5837
"Whenever this card attacks, exile target creature card from your graveyard. Create a tapped and attacking token that's a copy of that card, except it's a 3/3 black Wraith with menace. At the beginning of the next end step, exile that token unless this card is your Ring-bearer."