This magic +1 hollow rod is made of a blend of adamantium and mithril and is about 24" long from the top of the pommel to the tip of the weapon. It is partially filled with an unknown magical  liquid or slush that flows from the handle to the tip when swung, making it vibrate and causing a subsonic humm.  It tapers from 3" at the top to 1-1/2" at the guard.  At the pommel there is a lanyard that can be worn to keep the weapon from being disarmed.

The rod does 1d4 Bludgeoning damage plus an additional 1d4 Force damage.   When it strikes a target, it creates a translucent glowing bullseye at the point of impact (that lasts until the end of the next round) that changes color from red at the point of impact to orange, yellow, green, blue, indigo, and finally violet on the outer circle. It does critical hit damage if it strikes the bullseye again before it fades (-6 to hit  the bullseye intentionally, or it increases the chance if a critical hit by one(1) for a random hit).  

This rod can not kill a living creature.  If an attack from this weapon reduces a live creature to 0 hit points or lower, the attack automatically knocks the creature out instead of killing it. The creature simply falls unconscious and is stable (knocking out a creature, PHB 198).  It affects non-living targets (constructs, undead, vases, etc.) normally and can destroy them.

 

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

"1d4 Bludgeoning +1d4 Force + 1"

Proficiency with a Club allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Damage: Force, Unconscious, Damage, Combat, Light, Slow