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Oliver Queen returns to Star City still raw from survival, violence, and failure, only to become the subject of a silent killer who studies vigilantes the way others study crime. As Onomatopoeia moves through the city eliminating patterns, criminals, investigators, and anyone who believes they can control violence, Oliver is forced to abandon instinct, strategy, and ego just to survive. Across the limited series, ONOMATOPOEIA follows Oliver’s first true confrontation with a threat he cannot defeat — a killer who does not escalate, explain, or lose, but simply finishes what he chooses and moves on.