The ferocious ghost face wrapped in karmic fire was truly extraordinary. It plunged into the halo again, swiftly merging with the black halo, which had retreated until only a thin sliver remained.
In an instant, the black halo swelled. Just then, Xu Yi sent three more soul fragments into it. He had gone completely mad. As he released a vast number of Yin souls, the little Yin-soul figure grew distinct, then blurred again. His face was an eerie green, like algae dredged from the depths of a gloomy river.
The Ghost Master was so shocked that he nearly lost his form.
The Ghost Master had seen plenty of Xu Yi's freakish Yin soul, but even with his imagination stretched to its limit, he couldn't begin to make sense of what was happening before him.
He had used a secret art to transform his essence, absorbed countless tens of thousands of blood sacrifices, and gathered an abundant supply of ghost essence. His Yin soul was stronger than anyone else's in this world.
Even so, there was no way he could release such a vast amount of Yin soul in such a hurry.
But believing that Xu Yi's Yin soul was stronger than his own was even harder than believing that someone in this world had reached the peak of Soul Sensing.
All martial artists cultivated by striving to transcend their nature and defy their fate. Put simply, they could strengthen the Soul and Spirit through unwavering effort.
That so-called unwavering effort meant diligent cultivation and hard training, tempering the body until its strength gave rise to a powerful Yin soul.
In other words, a strong body produced a strong Yin soul. From that perspective, the body and the Yin soul had to be in balance.
If the Yin soul was stronger