If a friendly Walker, Vehicle or Super-heavy Vehicle, or a model with the Automata or Automated Sentry special rule, within 3" of a model with this rule suffers a Wound due to a special rule or one that is inflicted by a weapon with an AP of -2 or worse, roll a D6. On a 5+, that Wound is ignored and has no effect. Battlesmith cannot be used against Wounds suffered in a Fight.
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