Arclight Boomerang

You can use a bonus action to speak this magic boomerang's command word, causing errant storms to erupt from the haft. While the boomerang is activated, it deals an extra 2d6 lightning damage to any target it hits. The storms last until you use a bonus action to speak the command word again or until you drop or sheathe the sword.

Much like lightning seeking the ground. This boomerang returns to its user after each attack.

The boomerang is a ranged weapon, and any creature proficient with the javelin is also proficient with this weapon.

On a miss, a boomerang returns to the thrower's hand.

Notes: Damage: Lightning, Damage, Combat, Range