Yin-Yang Coexistence, Space Soul Core, Sun Moon Phenomenon

Not good!

Seeing the sudden change, everyone in the distance turned pale.

Snow Empress's expression was solemn. She knew very well what this meant.

It showed that even Su Yu's physique was struggling to withstand the pressure caused by the clash between the two Soul Cores.

This was the difficulty of Yin-Yang Complementary Dual Soul Cores.

Back then, she had failed in her attempt to form Yin-Yang Complementary Dual Soul Cores because her physique had not been strong enough, damaging her foundation.

That was why she had been unable to survive the seven-hundred-thousand-year Heavenly Tribulation.

And now, Su Yu was facing this very problem.

Moreover, the predicament Su Yu faced was far greater than hers had been.

The second Soul Core Su Yu had chosen was of the space attribute. The space attribute was unquestionably a high-level attribute.

Mastering it was no easy task.

"Su Yu, you must hold steady."

Snow Empress murmured inwardly.

She still had great faith in Su Yu. She believed he would definitely overcome this difficulty.

"Big Brother!"

Shui Lingguang's expression was equally grave, and worry could not be concealed from her beautiful face.

"Was it this difficult for you back then?"

Mu Wu looked in Su Yu's direction and nodded slightly. "Yin-Yang Complementary Dual Soul Cores are inherently a method as difficult as ascending to the heavens."

"Otherwise, no one would have accomplished it in all these centuries."

"The hardest part of Yin-Yang Complementary Dual Soul Cores is maintaining the balance between the two Soul Cores."

"For Yin and Yang to complement each other, one must first endure the opposing conflict between the Yin and Yang attributes."

"It is an immense test of Spiritual Power, and especially of one's physique."

"Back then, I was only fortunate enough to survive it because my Soul Power was