Winter Orb 
Artifact
$11.92 #3447 2.93 33.2 years
As long as this artifact is untapped, players can't untap more than one land during their untap steps.
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Cards similar to Winter Orb 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.
Static Orb97%
$2.77↓#5827↓2.71↓29.0 years↓
"As long as this artifact is untapped, players can't untap more than two permanents during their untap steps."
Howling Mine84%
$5.26↓#722↑0.32↓33.2 years
"At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card."
Storage Matrix76%
$2.63↓#13876↓1.68↓27.4 years↓
"As long as this artifact is untapped, each player chooses artifact, creature, or land during their untap step. That player can untap only permanents of the chosen type this step."
Smoke76%
$7.41↓#6581↓1.72↓33.2 years
"Players can't untap more than one creature during their untap steps."
Damping Field76%
$7.52↓#27435↓1.22↓32.6 years
"Players can't untap more than one artifact during their untap steps."
Imi Statue76%
$0.38↓#25199↓1.17↓22.1 years↓
"Players can't untap more than one artifact during their untap steps."
Winter Moon75%
$0.60↓#29512.32↓2.3 years↓
"Players can't untap more than one nonbasic land during their untap steps."
Blinkmoth Urn70%
$0.92↓#5884↓0.18↓23.0 years↓
"At the beginning of each player's first main phase, if this artifact is untapped, that player adds 
for each artifact they control."
for each artifact they control."
Trinisphere70%
$33.05↑#5341↓1.70↓22.7 years↓
"As long as this artifact is untapped, each spell that would cost less than three mana to cast costs three mana to cast."
Rising Waters70%
$2.07↓#17757↓2.31↓26.7 years↓
"At the beginning of each player's upkeep, that player untaps a land they control."
Hokori, Dust Drinker70%
$1.97↓#14011↓2.32↓21.7 years↓
"At the beginning of each player's upkeep, that player untaps a land they control."