Marble Titan 
Creature — Giant
$2.05 #18234 1.13 29.0 years
Creatures with power 3 or greater don't untap during their controllers' untap steps.
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Cards similar to Marble Titan 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.
Meekstone100%
$5.87↑#2829↑1.52↑33.2 years↑
"Creatures with power 3 or greater don't untap during their controllers' untap steps."
Crackdown92%
$1.00↓#12491↑1.27↑27.0 years↓
"Nonwhite creatures with power 3 or greater don't untap during their controllers' untap steps."
Juntu Stakes88%
$0.29↓#25720↓0.73↓26.0 years↓
"Creatures with power 1 or less don't untap during their controllers' untap steps."
Dream Tides77%
$0.41↓#183391.54↑29.7 years
"Creatures don't untap during their controllers' untap steps."
Smoke75%
$7.41↑#6581↑1.72↑33.2 years↑
"Players can't untap more than one creature during their untap steps."
Mudslide74%
$6.71↑#198130.90↓31.4 years↑
"Creatures without flying don't untap during their controllers' untap steps."
Intruder Alarm74%
$3.71↑#1735↑1.51↑28.6 years
"Creatures don't untap during their controllers' untap steps."
Blizzard72%
$0.83↓#28621↓0.61↓31.4 years↑
"Creatures with flying don't untap during their controllers' untap steps."
An-Zerrin Ruins72%
$3.14↑#21991↓1.1531.1 years↑
"Creatures of the chosen type don't untap during their controllers' untap steps."
Dusk // Dawn72%
$0.26↓#971↑0.34↓9.5 years↓
"Destroy all creatures with power 3 or greater."
Solar Tide71%
$0.79↓#201730.06↓23.0 years↓
"• Destroy all creatures with power 3 or greater."
The Battle of Bywater70%
$1.87↓#1863↑0.40↓3.3 years↓
"Destroy all creatures with power 3 or greater. Then create a Food token for each creature you control."
Energy Storm70%
$1.41↓#27699↓1.1231.4 years↑
"Creatures with flying don't untap during their controllers' untap steps."
Fell the Mighty70%
$0.30↓#1499↑0.48↓12.0 years↓
"Destroy all creatures with power greater than target creature's power."