Amulet of Vigor 
Artifact
$50.40 #1283 0.75 16.6 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 Sentinel80%
$0.20↓#12335↓0.17↓1.1 years↓
"Whenever this creature becomes tapped, untap another target permanent. This ability triggers only once each turn."
Archelos, Lagoon Mystic74%
$0.26↓#8524↓0.44↓5.8 years↓
"As long as this card is tapped, other permanents enter tapped."
Volition Reins73%
$0.14↓#21736↓0.50↓15.9 years
"When this Aura enters, if enchanted permanent is tapped, untap it."
Cacophodon72%
$0.26↓#10920↓0.20↓8.6 years↓
"Whenever this creature is dealt damage, untap target permanent."
Kiora's Follower71%
$0.34↓#1579↓0.29↓12.6 years↓
"
: Untap another target permanent."
: Untap another target permanent."