Duplicant 
Artifact Creature — Shapeshifter
$0.29 #2901 0.29 22.9 years
Imprint — When this creature enters, you may exile target nontoken creature.
As long as a card exiled with this creature is a creature card, this creature has the power, toughness, and creature types of the last creature card exiled with it. It's still a Shapeshifter.
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Cards similar to Duplicant 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.
Phyrexian Ingester88%
$0.13↓#12576↓0.13↓15.3 years↓
"When this creature enters, you may exile target nontoken creature."
+1 more matching line
Koh, the Face Stealer82%
$0.36↑#9664↓0.00↓0.8 years↓
"When this card enters, exile up to one other target creature."
+1 more matching line
Drach'Nyen82%
$0.39↑#13090↓0.05↓3.9 years↓
"When this card enters, exile up to one target creature."
Halfdane78%
$35.20↑#28300↓0.60↑32.3 years↑
"At the beginning of your upkeep, change this card's base power and toughness to the power and toughness of target creature other than this card until the end of your next upkeep."
Assimilation Aegis74%
$0.42↑#9834↓0.382.4 years↓
"When this Equipment enters, exile up to one target creature until this Equipment leaves the battlefield."
+1 more matching line
Bishop of Binding72%
$0.23↓#18667↓0.07↓8.6 years↓
"When this creature enters, exile target creature an opponent controls until this creature leaves the battlefield."
+1 more matching line
Pillar of Light72%
$0.11↓#24717↓0.2412.1 years↓
"Exile target creature with toughness 4 or greater."
Unidentified Hovership71%
$0.26↓#6985↓0.221.9 years↓
"When this Vehicle enters, exile up to one target creature with toughness 5 or less."