Lore
Just who was it who sealed Dark Frame in the world within the mirror? Even it doesn't remember; all it remembers is that it spent great effort trying to break free of the mirror world, but sadly, it was fettered by a new dark force halfway through the implementation of its plan. And from that moment onward, it became a strange monster that bears the burden of the world within the mirror. It is still searching for a way out, and it's said that recently, it's trying to use a scapegoat method to draw a targeted adventurer into the mirror and replace itself. Hm... Does this so-called mirror world actually exist? Just what kind of energy does it contain? Seems worthy of investigating... The armor merchant Dael is seeking inspiration from monsters to design new armor.
