It is suggested you choose the class that have the largest chance of winning. Then talk to Eremite Chong Un who is standing in the middle of the hall, and then choose one of the six flags, which respectively correspond to six classes with each professional logo.
Mushin Tower Floor 1 You need to choose any two NPC challengers to challenge. This guide is to introduce how to complete Mushin’s Tower from Floor 1 - Floor 6.
This dungeon is not so difficult, but if you can level up your weapon and soul shield. With the update of Rising Waters, Mushin’s Tower is open.