Wu T'ian return from the Gates of Heaven when the Eight Immortals have given them a task to fulfill. The Quest rating represents how much attuned the undying is to his duty to Heaven and the to the Tao itself. Each duty can lead the Wu T'ian everywhere in the Tellurian, from the Middle Kingdom to Yomi Wan itself. When the task is fulfilled, the Immortal "dies" and returns to the Gates of Heaven. Should the Wu T'ian be destroying during the fulfillment of his task, he will appear before the gates where he will contemplate on why he failed and return eventually to the place he died.
Tasks vary in their directness and time limits and can generally involve everything, from accompanying a girl to her parents from constructing a haven for tormented souls within the Wicked City.