Shi Mu's expression changed greatly as he realized the force and power of the yin and yang in his body had been absorbed. The runes gradually became thinner.
Shi Mu saw this and felt immense joy in his heart though he was trying his best to support himself from getting absorbed entirely.
The white tiger demon spirit stood aside and watched quietly. He did not make a single sound nor lend a helping hand.
Time passed bit by bit until an hour had passed by. The black and white rune was left with only a thin layer.
In contrast, Shi Mu's face was pale as a sheet. The inner qi within his body had been depleted, and the black and white light on his hands glowed faintly.
"It seems that this rune was set up by the white azure ancestors to test my strength..." Shi Mu looked at the white tiger demon spirit and gritted his teeth.