Rust Tick 
Artifact Creature — Insect
$0.21 #26604 0.13 16.1 years
You may choose not to untap this creature during your untap step.
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Cards similar to Rust Tick 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 Gremlins99%
$1.06↑#307170.1432.6 years↑
"
: 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
Kill Switch94%
$4.04↑#16897↑1.13↑26.7 years↑
"
,
: Tap all other artifacts. They don't untap during their controllers' untap steps for as long as this artifact remains tapped."
Amber Prison88%
$0.31↑#234730.25↑30.0 years↑
"
,
: Tap target artifact, creature, or land. That permanent doesn't untap during its controller's untap step for as long as this artifact remains tapped."
+1 more matching line
Hyperion Blacksmith80%
$2.40↑#31976↓0.1132.4 years↑
"
: You may tap or untap target artifact an opponent controls."
Roaring Slagwurm78%
$0.32↑#227870.2222.7 years↑
"Whenever this creature attacks, tap all artifacts."
Tumble Magnet78%
$0.10↓#267410.0616.1 years
"
, Remove a charge counter from this artifact: Tap target artifact or creature."
Vedalken Certarch75%
$0.09↓#275150.2016.1 years
"
: Tap target artifact, creature, or land. Activate only if you control three or more artifacts."
Janjeet Sentry72%
$0.08↓#222260.1710.1 years↓
"
, Pay 
: You may tap or untap target artifact or creature."