Harsh Mentor {1}{R}
Creature — Human Cleric
Whenever an opponent activates an ability of an artifact, creature, or land on the battlefield, if it isn't a mana ability, this creature deals 2 damage to that player.
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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.
Immolation Shaman 90%
$0.46#6911
"Whenever an opponent activates an ability of an artifact, creature, or land that isn't a mana ability, this creature deals 1 damage to that player."
Sardian Avenger 82%
$1.62#7610
"Whenever an artifact an opponent controls is put into a graveyard from the battlefield, this creature deals 1 damage to that player."