Worn Powerstone 
Artifact
$0.26 #573 0.00 28.0 years
This artifact enters tapped.
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Cards similar to Worn Powerstone 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.
Firemind Vessel100%
$0.22↓#4256↓0.007.5 years↓
"This artifact enters tapped."
Sisay's Ring98%
$0.33↑#4879↓0.58↑29.7 years↑
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Ur-Golem's Eye98%
$0.32↑#7606↓0.0022.7 years↓
": Add ."
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Thran Dynamo98%
$2.06↑#195↑0.0627.4 years
": Add ."
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Sky Diamond96%
$0.26#824↓0.0630.0 years↑
"This artifact enters tapped."
Fire Diamond96%
$0.23↓#729↓0.0030.0 years↑
"This artifact enters tapped."
Marble Diamond96%
$0.20↓#1117↓0.0030.0 years↑
"This artifact enters tapped."
Charcoal Diamond96%
$0.26#702↓0.0630.0 years↑
"This artifact enters tapped."
Moss Diamond96%
$0.21↓#4429↓0.0030.0 years↑
"This artifact enters tapped."
Sol Ring96%
$1.24↑#1↑1.59↑33.2 years↑
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White Lotus Tile96%
$4.71↑#3857↓0.31↑0.9 years↓
"This artifact enters tapped."
Empowered Autogenerator95%
$0.23↓#3998↓0.10↑7.2 years↓
"This artifact enters tapped."
The Eternity Elevator94%
$2.06↑#1560↓0.12↑1.2 years↓
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Prismatic Geoscope93%
$1.47↑#16916↓0.079.9 years↓
"This artifact enters tapped."
Timeless Lotus93%
$3.45↑#2109↓0.29↑4.1 years↓
"this card enters tapped."
Arc Reactor92%
$0.87↑#5606↓0.28↑0.3 years↓
"This artifact enters tapped."
+1 more matching line
Kozilek's Channeler90%
$0.27↑#7180↓0.10↑11.0 years↓
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Sunastian Falconer90%
$3.70↑#29159↓0.0032.4 years↑
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Weaver of Currents90%
$0.09↓#18230↓0.069.5 years↓
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Palladium Myr90%
$0.33↑#730↓0.10↑16.1 years↓
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