In my heart, the true identity behind the Divine Spear's Impermanence might be King Zhuanlun, and now, Gua Tianshi's suspicion is escalating rapidly.
Combining this with the appearance of Dong Che, it is not entirely impossible to assume that Gua Tianshi arranged this to get closer to us. Moreover, Dong Che mysteriously paying attention to Mazao further deepens the clouds of doubt in my mind.
Should I test Dong Che with the Fake Water Moon? Currently, I can only use the Fake Water Moon to enter the target's Spirit World. From the feedback when I tried it on Mazao earlier, it's clear that simply entering one's Spirit World does not allow absolute freedom to do as one pleases or to directly know everything about them. Moreover, even if Gua Tianshi really is the hostile Impermanence, discovering this in Dong Che's Spirit World would only lead to the hostile Impermanence catching us in the act once again.