Casey Jones, Asphalt Hooligan {2}{R}
Legendary Creature — Human Berserker
Double strike (This creature deals both first-strike and regular combat damage.)
{4}: Double Casey Jones's power until end of turn. Any player may activate this ability.
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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.