Yin and Yang reversed, day and night inverted.
The person with the deepest comprehension of this was precisely Xue Pingzhi, who was most skilled in the Yin Yang Method.
She suddenly turned pale, because even when she was struck by the sword earlier, no such chaotic momentum had appeared; yet at this split second, she suffered a violent traction. To control it, Xue Pingzhi had to expend more than tenfold her strength, and moreover, under this rapidly shifting and intense rhythm, she had to maintain the stable transformation of the Yin-Yang Two Energies within Yu Ci's body. The difficulty of this was roughly equivalent to instantly pushing the intensity of a divine intent shock from "one million level" to "ten million level"—which was achieving a leap from "Chu Yuanxiang" to "Rakshasa Ghost King"!
Caught unprepared, Xue Pingzhi actually managed to hold on, but the price was a sharp pain in her chest and her viscera nearly shattering all at once, immediately suffering injuries even heavier than when she was struck by the sword earlier.
As for Madam Xia, the sorcery treasure defending her, named the "Vast Azure Seal", was truly of the first tier, and her response was by no means wrong; however, the enemy she faced happened to surpass the limit of what she could handle.
The heaven, earth, and void grew alternately bright and dim. The verdant hue of the Vast Azure Mountains transformed by the purple seal abruptly waned, their vitality withering, and all earth-vein spiritual apertures were choked and difficult to pass. Such a method clearly pushed the Arts of Creation to the extreme, and within it lay a certain extremely bizarre divine intent transformation, causing Madam Xia's originally most compatible qi circulation with the sorcery treasure to inexplicably develop a fault line.
The sorcery treasure