Marble Diamond 
Artifact
$0.20 #1117 0.00 30.0 years
This artifact enters tapped.
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Cards similar to Marble Diamond 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.
Sky Diamond100%
$0.26↑#824↑0.0630.0 years
"This artifact enters tapped."
Fire Diamond100%
$0.22↑#730↑0.0030.0 years
"This artifact enters tapped."
Charcoal Diamond100%
$0.26↑#701↑0.0630.0 years
"This artifact enters tapped."
Moss Diamond100%
$0.21↑#4429↓0.0030.0 years
"This artifact enters tapped."
Worn Powerstone96%
$0.26↑#573↑0.0028.0 years↓
"This artifact enters tapped."
Firemind Vessel96%
$0.22↑#4258↓0.007.5 years↓
"This artifact enters tapped."
Azorius Signet96%
$0.27↑#211↑0.27↑20.5 years↓
"
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."
, : Add ."
Orzhov Signet96%
$0.31↑#190↑0.0020.7 years↓
", : Add 
."
, : Add ."
Selesnya Signet96%
$0.29↑#10860.0021.2 years↓
", : Add 
."
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Boros Signet96%
$0.53↑#254↑0.22↑21.0 years↓
", : Add 
."
, : Add ."
Seashell Cameo95%
$0.26↑#25100↓0.0026.0 years↓
": Add or ."
: Add or ."
Tigereye Cameo95%
$0.23↑#19514↓0.0026.0 years↓
": Add or ."
: Add or ."
Obelisk of Esper94%
$0.22↑#13910↓0.0018.0 years↓
": Add , , or ."
: Add , , or ."
Obelisk of Bant94%
$0.18↓#19857↓0.0018.0 years↓
": Add , , or ."
: Add , , or ."
Obelisk of Naya94%
$0.25↑#18758↓0.0018.0 years↓
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: Add , , or ."
Star Compass93%
$0.32↑#4755↓0.25↑25.7 years↓
"This artifact enters tapped."
Prismatic Lens90%
$0.27↑#1660↓0.0020.0 years↓
": Add 
."
: Add ."
White Lotus Tile90%
$4.74↑#3855↓0.31↑0.9 years↓
"This artifact enters tapped."
Timeless Lotus90%
$3.39↑#2109↓0.29↑4.1 years↓
"this card enters tapped."
+1 more matching line
Empowered Autogenerator88%
$0.23↑#3999↓0.10↑7.2 years↓
"This artifact enters tapped."