Wu Pifu wasn't afraid of any deficiency in his essence.
In fact, he had vaguely sensed this long ago: as long as he wasn't completely killed in a single blow, he always seemed able to heal and recover fully, no matter what kind of damage he suffered.
Before he obtained the Holy Grail, Gaia Human civilization had only Carbon-based Nano-Units to repair the flesh, plus a handful of instruments that could stabilize the mind. Even that was not healing, merely stabilization. Yet Wu Pifu had repeatedly hovered on the brink of death before then. Psychic Negative Backlash had repeatedly mangled his body beyond recognition. Forget his flesh—even his senses had begun to leave the realm of biology. If those injuries and effects had happened to anyone else, they would likely have mutated or died on the spot, without even a chance to stabilize themselves.
But Wu Pifu? All he needed was sleep. Wounds too difficult to treat? Sleep! Mental negativity overloaded? Sleep! Body already collapsing? Sleep!
Well, there had been one exception: when he faced the four origins directly. Not only did he refuse to retreat, he fought desperately and cut them all down, completely wrecking himself in the process. He had needed time reversal to reconstruct his body. Even then, his consciousness, spirit, soul, and true essence had still been able to recover slowly afterward.
So he had always been able to heal what others called deficiencies of essence, essence contamination, and the like. He even vaguely suspected that he was not an Ultimate Path Seed at all. He was fundamentally different from true Ultimate Path Seeds, who could learn Transcendent Paths without limit. He was just fucking brute force overcoming everything... The essence of his soul and true spirit was simply too vast. If one person's soul and