Gravegouger 

Creature — Nightmare Horror
When this creature enters, exile up to two target cards from a single graveyard.
When this creature leaves the battlefield, return the exiled cards to their owner'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.
Griffnaut Tracker 100%
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"When this creature enters, exile up to two target cards from a single graveyard."
Feral Deathgorger // Dusk Sight 100%
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"When this creature enters, exile up to two target cards from a single graveyard."
Arashin Sunshield 100%
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"When this creature enters, exile up to two target cards from a single graveyard."