Trigon of Corruption {4}
Artifact
This artifact enters with three charge counters on it.
{B}{B}, {T}: Put a charge counter on this artifact.
{2}, {T}, Remove a charge counter from this artifact: Put a -1/-1 counter on target creature.
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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.
Transmogrifying Wand 100%
$0.37#7697
"This artifact enters with three charge counters on it."
+1 more matching line
Trigon of Infestation 100%
$0.21#22876
"This artifact enters with three charge counters on it."
+2 more matching lines
Shriekhorn 100%
$0.23#17247
"This artifact enters with three charge counters on it."
+1 more matching line
Trigon of Mending 100%
$0.06#29681
"This artifact enters with three charge counters on it."
+1 more matching line
Trigon of Thought 100%
$0.09#29056
"This artifact enters with three charge counters on it."
+2 more matching lines
Tumble Magnet 100%
$0.12#26107
"This artifact enters with three charge counters on it."
+1 more matching line
Necrogen Censer 99%
$0.08#29543
"This artifact enters with two charge counters on it."
+1 more matching line
Surge Node 91%
$0.36#17588
"This artifact enters with six charge counters on it."
+1 more matching line
Chimeric Mass 91%
$0.35#14177
"This artifact enters with X charge counters on it."
+1 more matching line