Reverberation

Reverberation
50% chance to shot additional tile piercing projectile Projectile deals same damage is main, but consume 15 mana each
Type	Weapon
Sub Type	Ranged Weapon
Max Stack	1
Sell Value	10
Crafting Recipe
Crafted with	20 + + 200 +20
Crafting Station

Reverberation (Repeater) is a weapon piece of Reverberation set.

You can also obtain it from Operator, without crafting involved.

Reverberation with full armor set