Axiom Arc

You have +4 to attack and damage rolls with this weapon 

While attuned to this item, if you kill a creature within 1 round of using a class feature or racial trait, that feature or trait will regain its use as if you completed a short or long rest.

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: Bonus: Magic, League of Legends Items, Combat, Warding, Range