Those roots were like countless, incredibly tiny insects, constantly gnawing away, devouring their immortal Dao patterns and replacing them with the demonic path of the Dark Sea. They consumed the original flesh of their bodies, replacing their forms with their own flesh. The Longevity Sovereign sensed those insects eating his eyes, creating new ones as they ate.
He also felt a strange sensation on his tongue. A part of it was slowly losing all feeling, while at the same time, it felt as if something new had appeared in his mouth. Something that did not belong to him.
It was a tongue, but not his tongue, and it was unspeakably agile. This tongue licked his lips, counted his teeth, and then, one by one, his teeth began to fall out as new ones grew in. But those were not his teeth.
His eyes widened, filled with terror. He realized he was being devoured at a rapid pace! At the same time, another being, one that was not him, was rapidly forming.
The experience was far too terrifying. The Longevity Sovereign summoned the Demon-Purging Horsetail Whisk, using his residual consciousness to activate the magical artifact.
"Whisk, refine the demon!"