The provided Recapy context for Evil Dead Burn does not say what specifically triggers the Deadite transformations.
Related franchise context (may differ from this film): in previous Evil Dead entries, people become Deadites after contact with Kandarian demon forces—typically via the Necronomicon (reading passages), ritual/occult activity, or exposure to awakened/possessed entities—so those are common mechanisms but aren’t confirmation for this title.
Would you like me to look up the film’s specific trigger and report spoiler details now, or do you have a scene/quote from the movie you can paste for me to analyze?
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