After her body and soul were destroyed, the remaining energy of the Celestial Thearch became ownerless and gradually dissipated into this world, feeding back into it.
If a supreme powerhouse like the Celestial Thearch left behind a corpse after death, they could casually throw their corpse anywhere and create a cultivation holy land in minutes.
Even in a world where spiritual energy had dried up, burying the corpse of an existence at the level of a Heavenly Emperor could instantly create a grotto-heaven with spiritual energy explosions within the affected area!
If they died without a complete corpse, the energy that spread out after their death could affect the place where they died for thousands of years. However, whether this effect was good or bad depended on the personal attributes of the deceased.