After all, Yin Yang Power was an extremely pure force.
It was an immensely powerful existence.
Almost no one could wield Yin Yang Power.
Only Taishang Laozi cultivated Yin Yang Power exclusively.
All the Yin Yang Power in the Primordial Chaos World was part of Taishang Laozi's foundation.
Yet now, Demon Ancestor Rahu of the Heavenly Machine Tower was also cultivating Yin Yang Power.
He could cultivate extreme Yin and extreme Yang within his body.
He could wield them separately.
He could also balance Yin and Yang.
What did this mean?
It meant Demon Ancestor Rahu had already gained an incredibly powerful mastery over Yin Yang Power.
No wonder Demon Ancestor Rahu had three snake heads.
There was probably a deeper significance to them.
One snake head contained extreme Yang Power.
Another contained extreme Yin Power.
The third contained the power of balanced Yin and Yang.
Demon Ancestor Rahu could switch to whichever power he wanted at any time.
Just thinking about it was terrifying.
If he used Yin Power,
Demon Ancestor Rahu would become the Yin Demon.
If he used Yang Power,
that fellow would become the Yang Demon.
If he brought the Yin and Yang Power within his body into balance,
that was probably Demon Ancestor Rahu's strongest form.
Such mastery
naturally made Taishang Laozi extremely cautious.
His gaze even betrayed a hint of wariness.
After all, the two were evenly matched.
He understood how powerful Demon Ancestor Rahu was.
Demon Ancestor Rahu also knew him extremely well.
The only difference was that Taishang Laozi cultivated the Orthodox Xuanmen's Yin Yang Power,
while Demon Ancestor Rahu cultivated the Yin-Yang Demonic Art.
Though they were different,
their fundamental nature was not all that far apart.
But during the last Human-Demon War,
why hadn't Demon Ancestor Rahu used this ability?