C213 The Power of the Pontifex
Shen Wuyou simply needed to hand Guanyue over to the Cult of the Unliving.
Or to put it another way, if he stopped interfering, the Cult would reclaim Guanyue without issue.
To Shen Wuyou, this "condition" was hardly a condition at all.
After all, Guanyue was never his to begin with. She was merely someone he had rescued from the Green Lotus Sword Sect. Reflecting on it now