Knowledge Vault 
Artifact
{2}, {T}: Exile the top card of your library face down.
{0}: Sacrifice this artifact. If you do, discard your hand, then put all cards exiled with this artifact into their owner's hand.
When this artifact leaves the battlefield, put all cards exiled with it into 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.
Ezrim, Agency Chief 87%
$0.21#13936
"{1}, Sacrifice an artifact: this card gains your choice of vigilance, lifelink, or hexproof until end of turn."
Rona, Disciple of Gix 84%
$0.16#23514
"{4}, {T}: Exile the top card of your library."
+1 more matching line
Elkin Bottle 83%
#30175
"{3}, {T}: Exile the top card of your library. Until the beginning of your next upkeep, you may play that card."