Ratchet Bomb {2}
Artifact
{T}: Put a charge counter on this artifact.
{T}, Sacrifice this artifact: Destroy each nonland permanent with mana value equal to the number of charge counters on this artifact.
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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.
Otherworld Atlas 100%
$1.41#7018
"{T}: Put a charge counter on this artifact."
+1 more matching line
Empowered Autogenerator 95%
$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."
Engineered Explosives 88%
$8.19#12685
"{2}, Sacrifice this artifact: Destroy each nonland permanent with mana value equal to the number of charge counters on this artifact."
Jeweled Amulet 88%
#3622
"{1}, {T}: Put a charge counter on this artifact. Note the type of mana spent to pay this activation cost. Activate only if there are no charge counters on this artifact."
+1 more matching line
Magistrate's Scepter 86%
$3.42#5640
"{4}, {T}: Put a charge counter on this artifact."
+1 more matching line
Conversion Chamber 85%
$0.10#23220
"{2}, {T}, Remove a charge counter from this artifact: Create a 3/3 colorless Phyrexian Golem artifact creature token."