Mask of Insanity Development Materials A material used to break through weapons, ascend Resonators, and upgrade skills.

A very peculiar Fractsidus mask. It would be nearly impossible for a normal person to imagine the mental state of its owner. Judging from the residual frequency on the mask, one can perceive that the owner's emotions have become severely distorted, generating frequencies that resemble Tacet Discords.
Sources
Synthesis
Drop: Fractsidus