Resentment, an inextinguishable resentment.
The once Demon Monk, now bound to an undying and ever-hungering existence as a Jiang Gui, could not enter the cycle of reincarnation due to being decapitated at his time of death, losing a soul and a spirit in the process. Even as a Jiang Gui, he could not move, surviving solely upon devouring flesh and blood.
Originally, if Gui Daozi had truly infiltrated Beiliang City and, using his means combined with the resources within, created several new Jiang Gui to merge into his own body, he could have embarked on the path of becoming a Zombie and cultivated immortality using the Zombie's undying form.
Unfortunately, Gui Daozi's plan fell apart before it could get off the ground, suffocated in its cradle by a series of sudden, unforeseen events. Thus, even with his powerful Jiang Gui body, being shorthanded a soul and a spirit, he could only sit motionless like a statue within the cave.
However, the unexpected still happened.