When a martial artist advanced to the Transcendent-grade, the Essence Soul would be in an illusory state at the beginning.
Su Jingxing practiced divine martial arts and spiritual martial arts together. His Essence Soul and physical body were also turned illusory and corporeal at will.
Now that the big white goose has turned illusory, didn't that mean that it had also reached the Transcendent-grade?
Or rather, the big white goose's true bloodline had been activated and its innate ability awakened?
The power of birds and beasts basically came from their bloodline.
The older and stronger the bloodline, the stronger the power after awakening.
Su Jingxing had always believed that the big white goose had become a Mutated Beast because it was infected by the Beast Spirit Devil Insect. Now that he thought about it again, he had probably misunderstood from the beginning.