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

A mask worn by Fractsidus active members. Due to long-term use, its ability to stabilize frequency has been greatly mitigated. One can clearly feel the torment of being drowning in negative emotions from the mask.
Sources
Synthesis - Purification
Synthesis - Transposition
Drop: Fractsidus