Upon entering, head east towards (K-8). At (K-8) you will see 2 dolls. There is a cermet gate on the east wall. Click on this gate and you will zone into Qu'Bia Arena. While in the waiting area, prep up for the fight.
The majority of the mobs in Fei'Yin detect by sound, but there are several mobs that aggro to magic.
The boss is the Archlich Taber'quoan with 6-8 minions. Concentrate on the Archlich and once he is dead you are done. There is a level cap of 50 for the boss and only 6 people (one party) can enter at a time.