Chimeric Mass 
Artifact
This artifact enters with X charge counters on it.
{1}: Until end of turn, this artifact becomes a Construct artifact creature with "This creature's power and toughness are each equal to the number of charge counters on it."
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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.
Chalice of the Void 100%
$15.15#9098
"This artifact enters with X charge counters on it."
+1 more matching line
Surge Node 94%
$0.36#17588
"This artifact enters with six charge counters on it."
+1 more matching line
Trigon of Infestation 91%
$0.21#22876
"This artifact enters with three charge counters on it."
+1 more matching line
Trigon of Thought 91%
$0.09#29056
"This artifact enters with three charge counters on it."
+1 more matching line