Amulet of Vigor 
Artifact
$50.16 #1273 0.78 16.7 years
Whenever a permanent you control enters tapped, untap it.
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Cards similar to Amulet of Vigor 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.
Nanoform Sentinel79%
$0.16↓#12168↓0.00↓1.2 years↓
"Whenever this creature becomes tapped, untap another target permanent. This ability triggers only once each turn."
Archelos, Lagoon Mystic72%
$0.30↓#8770↓0.67↓5.9 years↓
"As long as this card is tapped, other permanents enter tapped."
Volition Reins72%
$0.18↓#22092↓0.7116.1 years
"When this Aura enters, if enchanted permanent is tapped, untap it."
Cacophodon71%
$0.21↓#10902↓0.18↓8.8 years↓
"Whenever this creature is dealt damage, untap target permanent."
Kiora's Follower70%
$0.31↓#1610↓0.33↓12.7 years↓
"
: Untap another target permanent."
: Untap another target permanent."