Wellspring 


Enchantment — Aura
Enchant land
When this Aura enters, gain control of enchanted land until end of turn.
At the beginning of your upkeep, untap enchanted land. You gain control of that land until end of turn.
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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.
Rising Waters 82%
$2.05#17155
"At the beginning of each player's upkeep, that player untaps a land they control."
Hokori, Dust Drinker 82%
$1.62#13615
"At the beginning of each player's upkeep, that player untaps a land they control."