Explosive Apparatus 
Artifact
{3}, {T}, Sacrifice this artifact: It deals 2 damage to any target.
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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.
Springjaw Trap 99%
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"{4}, {T}, Sacrifice this artifact: It deals 3 damage to any target."
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"{3}, {T}, Sacrifice this artifact: It deals damage equal to the number of charge counters on it to any target."
Barrage Ogre 82%
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"{T}, Sacrifice an artifact: This creature deals 2 damage to any target."
Orcish Vandal 82%
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"{T}, Sacrifice an artifact: This creature deals 2 damage to any target."