Rivals' Duel {3}{R}
Sorcery
Choose two target creatures that share no creature types. Those creatures fight each other. (Each deals damage equal to its power to the other.)
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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.