Boomerang Expert

Thanks to extensive practice with the boomerang, you gain the following benefits:

• You now have "expertise" with Boomerangs, essentially allowing you to add your proficiency bonus again to attacks made with boomerangs.
• Being within 5 feet of a hostile creature doesn’t impose disadvantage on your ranged attack rolls made with boomerangs.
• When you make an attack (melee or ranged) with a boomerang on a target, you may wait on the return. At the end of your turn, you may make an additional Returning Attack on the target with the boomerang. If the target is unaware of the weapon's returning property or cannot see the returning weapon, this attack has advantage. You may use this benefit a number of times equal to your proficiency bonus every short rest.