Damping Field {2}{W}
Enchantment
Players can't untap more than one artifact during their 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.
Winter Moon 91%
$0.41#2720
"Players can't untap more than one nonbasic land during their untap steps."
Shisato, Whispering Hunter 88%
$0.54#20588
"Whenever this card deals combat damage to a player, that player skips their next untap step."
Static Orb 87%
$14.92#5728
"As long as this artifact is untapped, players can't untap more than two permanents during their untap steps."
Ashnod's Battle Gear 86%
$0.20#30335
"You may choose not to untap this artifact during your untap step."
Vedalken Shackles 86%
$7.66#11447
"You may choose not to untap this artifact during your untap step."