The Challenge

Overview
Summary
 * 1) Find Bakghu and his gang in the Undercity.
 * 2) Defeat Bakghu's gang.
 * 3) Defeat Chong Poi's gang.
 * 4) Defeat Soar Windfeather's gang.
 * 5) Defeat Tae Xang's gang.
 * 6) See Senjo Wah for your reward.

Obtained From
 * Bakghu in the Shenzun Tunnels.

Reward
 * 3,000 XP
 * 175 Gold
 * Imperial Commendation

Dialog
 * "You think you are tough, do you? Let us see how you fight on our turf. If you have the courage, meet us in the Undercity. We will be waiting for you."

Walkthrough
This is a simple quest. From the Vizunah Square (Local's Quarter) location, head to the navpoint in the Undercity. There you will meet up with Bakghu and several passive Jade Brotherhood mobs. Three more groups of mobs show up, and then a free for all battle takes place. The mobs will fight each other, so try to gang up on the mobs that are being attacked by the other npcs. Once all the mobs are killed, talk to Senjo Wan for your reward.

Alternatively, you could wait until one group is remaining, usually weakend by the fight, and then you can go in and finish them off easily.