Meekstone {1}
Artifact
Creatures with power 3 or greater don't untap during their controllers' untap steps.
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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.
Marble Titan 100%
$1.63#17564
"Creatures with power 3 or greater don't untap during their controllers' untap steps."
Icy Blast 94%
$1.32#7055
"If you control a creature with power 4 or greater, those creatures don't untap during their controllers' next untap steps."
Crackdown 87%
$9.53#12484
"Nonwhite creatures with power 3 or greater don't untap during their controllers' untap steps."
Tifa, Martial Artist 83%
$3.41#4068
"Whenever one or more creatures you control with power 7 or greater deal combat damage to a player, untap all creatures you control. If it's the first combat phase of your turn, there is an additional combat phase after this phase."
An-Zerrin Ruins 83%
#21384
"Creatures of the chosen type don't untap during their controllers' untap steps."
Arena of the Ancients 83%
#18622
"Legendary creatures don't untap during their controllers' untap steps."