Dragon Breaker Nunchaku Form Elemental Unleash

Nunchaku Form Elemental Unleash - Two focused beams of energy shoot out from either end of Dragon Breaker

User can use an attack action to point both ends ends of the nunchaku releasing a beam of energy attacking two targets at the same time or 1 target for double damage. Targets within 50 feet must make a Dexterity saving throw. DC = 21 - (Distance from Dragon Breaker in feet / 5). On a successful save creature takes half damage. On a failure creature takes 5d8 elemental damage and is pushed back the difference between the DC and their saving throw x 5 feet and is knocked prone