Lu Chuan developed a speculation based on their description.
That white mushroom is very likely a rare type of Spiritual Medicine in the Cultivation World, the Yin-devouring Mushroom.
This Spiritual Medicine survives by consuming Yin Qi, but it doesn't grow just anywhere with dense Yin Qi; it only grows in the graves of powerful cultivators after their death.
It seems that underneath this dilapidated temple, there ought to be the grave of a formidable cultivator.
Cultivators already possess various Divine Skills, and powerful cultivators have many more unimaginable methods. After their death, their tombs often become terrifying forbidden zones, breeding all sorts of unpredictable dangers. If an ordinary person carelessly enters, they might barely escape with their life.