Vollux

Vollux is an entity made of actual light reflecting spherical mirrors and the visual effect works through shaders. The entity itself is made of 3 spherical mirror orbs and each can reflect projectiles and the reflected projectiles are harmful to the creatures shooting. The way that this creature can die is that it doesn't always reflect projectiles and if you shoot directly inside it from very close, it won't reflect your shot and would take it as damage.

Can be found mainly in the Tower, Magical Temple and Temple of the Art.