Lin Yun took out two mid-grade spiritual stones without any hesitation. Holding onto one with each of his hands, he sat down and closed his eyes. He began to circulate his spiritual energy through his veins based on the Iris Sword Sutra’s technique.

The meridians were separated into the primary and secondary. Before unlocking the Profound Martial Channel, a cultivator would only have eight primary meridians. On the other hand, there were countless secondary meridians and it was impossible to clear up all of them in one’s lifetime.

All martial techniques came with a mantra and the circulation would be different for each one. By using the physique’s origin energy, it would change into new energy.

The Iris Sword Sutra’s mantra was cryptic and challenging to comprehend. If Lin Yun’s comprehension were poor and he made the wrong insight, he would have to pay a considerable price for it.

In severe cases, he might even experience his meridians sapping and running amok. But fortunately, the first six stages wouldn’t be a problem for Lin Yun with his comprehension.

All it took was...