You have a +1 bonus to attack and damage rolls made with this magic weapon.

This throwing glaive is not the same polearm that is listed in the Players Handbook.  It has 5, 3 inch blades that are hidden in the weapon itself till it is thrown, which then, they extend.  This weapon is not a melee weapon and is considered a boomerang for range.   

You have a +1 bonus to attack and damage rolls made with this magic weapon.  When thrown it can be ricocheted to hit others, up to 3 targets within 5ft of each other.  The first target is the only one that needs to be hit, that roll that is used is also the same roll for the other 2 targets, hit or miss.  Once it has hit or missed intended targets it will return to the attuned user. 

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: Ranged Weapon Attack: Slashing, 10 mins of meditation and a drop of blood from the new user, Damage, Combat, Range