Tian Hao did not know how Sword Douluo Chen Xin would condense soul rings into gem-like forms resembling stars in the future. His initial guess was that it had something to do with that Seven Kill Sword Intent, the one thing that set Chen Xin apart from other Titled Douluo.
Although he had a Seven Kill Sword soul skill for research, he had never figured out that Seven Kill Sword Intent, much less learned to wield it freely. So he used another method.
He used certain techniques from the Soul Core condensation method to condense soul rings, ultimately compressing and solidifying them into gem form, similar to Sword Douluo's future method.
Moreover, the soul beast Soul Core condensation method derived from Ah Yin and Snow White Clothes was clearly more suitable for compressing soul beast soul rings. Once condensed into a solid state, they could remain sealed indefinitely so long as no external force interfered.
It was just that his current Mental Power could only compress white ten-year soul rings into solid gems. Hundred-year ones were beyond him, let alone thousand-year or ten-thousand-year soul rings.
And it took a long time. In the end, his Mental Power was still insufficient.
This was not merely a matter of quantity, but also quality and fine control.
He might not possess such vast Mental Power, but the Banyan Tree King did. That was one of the main reasons he had chosen to cooperate with it.
The Banyan Tree King extended an aerial root and accepted the white-ring gem, carefully examining it with Mental Power. Finally, it used Soul Power to disrupt the gem's stability. The gem shattered at once, turning into a white soul ring.
Yet that white soul ring did not last long before scattering apart, allowing the Banyan Tree King to