Double Cleave {1}{R/W}
Instant
Target creature gains double strike until end of turn. (It deals both first-strike and regular combat damage.)
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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.
Two-Headed Hunter // Twice the Rage 100%
$0.19#12163
"Target creature gains double strike until end of turn."