The main sacrificial Lotus form of the Kun Demon is similar to the Primordial Spirit Sword Lotus—it's highly likely they share the same origin.
All four True Persons noticed this point.
The main sacrificial Lotus is an essential part of the Kun Demon nest, assisting the queen in refining a large amount of high-quality Spirit Iron and Spiritual Gold, breeding more Kun Demons, and also being used in the construction of the nest.
Its roots penetrate deep into the earth, and even if a region's Kun Demons are eliminated and their nests uprooted, the main sacrificial Lotus may not be destroyed completely. After some time, it may grow again, attracting wild Kun Demons to gather and form a new nest once more.
The result of being unable to eradicate it completely is that it will revive like spring breezes that resurrect the dead.