Preferred Enemy

When you select this tactic, select one of the following Faction keywords: TYRANIDS, AELDARI, ORK, HERETICASTARTES, NECRONS, T’AU EMPIRE. When resolving an attack made with a melee weapon by a model with this tactic against a unit with that Faction keyword in a turn in which that model made a charge move, was charged or performed a Heroic Intervention, you can re-roll the hit roll.