Freyalise's Radiance {1}{G}
Enchantment
Cumulative upkeep {2} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Snow permanents 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.
Winter's Rest 85%
$0.28#12505
"As long as you control another snow permanent, enchanted creature doesn't untap during its controller's untap step."
Jorn, God of Winter // Kaldring, the Rimestaff 81%
$0.35#12660
"Whenever this card attacks, untap each snow permanent you control."