Emperor Mirrorsnow is an Eternal Emperor.
Emperor Mirrorsnow had long ago left the Endless Territories and wander around the primordial chaos.
He was a fickle, restless man. He didn’t have the patience necessary to teach any disciples. However, before he left, he produced a total of forty sword-ki paintings, a total of ten sets of four paintings.
Anyone who can collect an entire set and pass the trials he established within the paintings, will be able to receive his legacy and become his personal disciple. Every single set can only be successfully used once, and so theoretically speaking he can take on a total of ten disciples at most.