When you have full melee energy, Shotgun final blows activate your Defensive Strike and consume your melee energy. Shotgun final blows also give you melee energy.
While using a Void subclass, rapid Shotgun final blows or defeating a powerful combatant with a Shotgun will grant a Void overshield and start health regeneration. While you have a Void overshield, Shotguns deal additional damage, and Shotgun final blows refresh the overshield. Provides a moderate benefit to Shotgun airborne effectiveness and reload speed.