Smelted Chargebug {1}{R}
Artifact Creature — Insect
Menace
When this creature enters, you get {E}{E} (two energy counters).
Whenever this creature attacks, you may pay {E}. If you do, another target attacking creature gets +1/+0 and gains menace until end of turn.
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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.
Courageous Goblin 82%
$0.12#16454
"Whenever this creature attacks while you control a creature with power 4 or greater, this creature gets +1/+0 and gains menace until end of turn."
Quilled Charger 80%
$0.07#25336
"Whenever this creature attacks while saddled, it gets +1/+2 and gains menace until end of turn."
Territorial Aetherkite 96%
$0.19#11477
"When this creature enters, you get {E}{E} . Then you may pay one or more {E}. When you do, this creature deals that much damage to each other creature."
Amped Raptor 93%
$0.18#7368
"When this creature enters, you get {E}{E} . Then if you cast it from your hand, exile cards from the top of your library until you exile a nonland card. You may cast that card by paying an amount of {E} equal to its mana value rather than paying its mana cost."