WoWDB

Talk to Chen to begin the quest.

1. For the first boss, you must run over the small bubbles scattered throughout the room to weaken the water shield. Once enough bubbles are run over, you can right click the shield to disperse it and then damage the boss as normal. After a few rounds of this, the boss will die.
2. For the second boss, you have to right click on the barrels scattered throughout the room to stun him when he is "slippery", which will allow you to damage him. After a while, the slippery buff will reappear and you'll have to right click another of the barrels to stun him again. After a few rounds of this, he'll die.
3. For the final boss, you have to AOE down all of the small mobs. Once they're all dead, one large boss will spawn. Just DPS down the boss alongside Chen, eventually it will die.