Rust Tick {3}
Artifact Creature — Insect
You may choose not to untap this creature during your untap step.
{1}, {T}: Tap target artifact. It doesn't untap during its controller's untap step for as long as this creature remains tapped.
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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.
Phyrexian Gremlins 85%
$1.03#29985
"{T}: Tap target artifact. It doesn't untap during its controller's untap step for as long as this creature remains tapped."
+1 more matching line
Everglove Courier 100%
$0.09#29550
"You may choose not to untap this creature during your untap step."
Frightshroud Courier 100%
$0.15#29794
"You may choose not to untap this creature during your untap step."
Flamestick Courier 100%
$0.07#29066
"You may choose not to untap this creature during your untap step."
Ghosthelm Courier 100%
$0.20#28584
"You may choose not to untap this creature during your untap step."
Callous Oppressor 100%
$1.72#15408
"You may choose not to untap this creature during your untap step."
Mana Leech 100%
$0.20#29836
"You may choose not to untap this creature during your untap step."
+1 more matching line
Mole Worms 100%
$0.19#29646
"You may choose not to untap this creature during your untap step."
+1 more matching line
Hedge Whisperer 100%
$0.07#25634
"You may choose not to untap this creature during your untap step."