Cave People 


Creature — Human
Whenever this creature attacks, it gets +1/-2 until end of turn.
{1}{R}{R}, {T}: Target creature gains mountainwalk until end of turn. (It can't be blocked as long as defending player controls a Mountain.)
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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.
Flowstone Charger 94%
$0.11#31599
"Whenever this creature attacks, it gets +3/-3 until end of turn."
Genestealer Locus 82%
$0.23#19693
"Whenever a creature attacks you, it gets -1/-0 until end of turn."