Elementalist's Palette {3}
Artifact
Whenever you cast a spell with {X} in its mana cost, put two charge counters on this artifact.
{T}: Add one mana of any color.
{T}: Add {C} for each charge counter on this artifact. Spend this mana only on costs that contain {X}.
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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.
Everflowing Chalice 100%
$0.34#251
"{T}: Add {C} for each charge counter on this artifact."
+1 more matching line
Shrine of Boundless Growth 82%
$0.20#24430
"{T}, Sacrifice this artifact: Add {C} for each charge counter on this artifact."
+1 more matching line
Empowered Autogenerator 81%
$0.30#4112
"{T}: Put a charge counter on this artifact. Add X mana of any one color, where X is the number of charge counters on this artifact."