According to inscriptions nearby, the mask belonged to the mythical Seer. It was believed to grant the absolute visions that revealed the truth behind all things. One could see beyond illusions, discern good from evil, and perceive the true intentions of others. The power of seeing the truth also helps the Seer to foresee the future, which breaks through the boundary of time. 

The Seer uses its great power of it to anticipate disasters for the realm, but it also seels the harbor intentions of people lurking for betrayal and the power of masks. Seer also realizes that foreseeability would drive many into madness, and they are trapped in an endless loop of possible realities. Therefore, he decided to seal the mask away from those scheming individuals and the possible disasters caused by the mask.