Slumbering Cerberus 

Creature — Dog
This creature doesn't untap during your untap step.
Morbid — At the beginning of each end step, if a creature died this turn, untap this creature.
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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.
Foreboding Statue // Forsaken Thresher 88%
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"At the beginning of your end step, if there are three or more omen counters on this creature, untap it, then transform it."
Thousand Moons Infantry 86%
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"Untap this creature during each other player's untap step."
Phyrexian Gremlins 85%
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Everglove Courier 85%
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"You may choose not to untap this creature during your untap step."
Frightshroud Courier 85%
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"You may choose not to untap this creature during your untap step."
Ghosthelm Courier 85%
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"You may choose not to untap this creature during your untap step."
Callous Oppressor 85%
$1.72#15408
"You may choose not to untap this creature during your untap step."