Chainflinger 

Creature — Beast
{1}{R}, {T}: This creature deals 1 damage to any target.
Threshold — {2}{R}, {T}: This creature deals 2 damage to any target. Activate only if there are seven or more cards in your graveyard.
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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.
Ballista Watcher // Ballista Wielder 99%
$0.26#20473
"{2}{R}, {T}: This creature deals 1 damage to any target."
+1 more matching line
Sunflare Shaman 92%
$0.15#28099
"{1}{R}, {T}: This creature deals X damage to any target and X damage to itself, where X is the number of Elemental cards in your graveyard."