After zoning in, go to the left and you will see an enchained spirit of Zan Fi. A chat between the named next to the spirit will start.
Now defeat around 15 waves of mobs. The waves start off at level 67 and scale up to level 70.
NOTE: CONSERVE POWER, you only get roughly 10-15 seconds between rounds, and they will auto agro regardless where you are in the zone.
Eventually the waves will stop and the Kudzua the Tormentor next to Zan Fi will auto agro. She is level 71.
After the named is dead, click the tomb in the middle of room and the person who clicks it first will receive a flute in inventory. Have the person who got the flute target the spirit of Zan Fi and use the flute. A song plays and Zan Fi is released.