Only after he transformed into the Crimson Flame Thunder Monkey did the unbearable sensation vanish.
He soared through the thunder, exhilarated. After an hour, even the Crimson Flame Thunder Monkey began to feel uncomfortable. Rolling waves of magnetic thunder surged wildly into his body, until he could barely endure it.
Xu Yi did not stop. He pressed onward, and at last plunged into a flickering thundercloud.
The magnetic thunder within was more than ten times stronger than outside. The Crimson Flame Thunder Monkey's features twisted, and just as he was about to reach his limit, Xu Yi swept out a hand and swallowed a portion of Dao Source. A large amount of Profound Yellow Essence burst in his palm, turning into pure Profound Yellow Qi that wound around him.
In an instant, the Crimson Flame Thunder Monkey roared with delight inside the thundercloud.
Once his turbulent emotions settled, the Crimson Flame Thunder Monkey sat cross-legged in the cloud and silently circulated the True Art of Qian Yuan Lightning Control. Under his technique's control, the thunderfield around him began to fall into order.
As he gradually worked his way through to the Five Aggregates Palm Thunder, the entire thundercloud began to thin.
Then the Crimson Flame Thunder Monkey leaped out of the thinning cloud and into another. At the same time, a pitch-black particle, smaller than a grain of sand, appeared in his withered monkey paw: a Lightning Cloud Essence, forcibly drawn and refined from the thundercloud with the Five Aggregates Palm Thunder.
And so the Crimson Flame Thunder Monkey kept leaping from cloud to cloud, while the Dao Source continued to be refined and the supply of Profound Yellow Qi never ceased.
Having refined Dao Source before, Xu Yi remembered all too well the unparalleled nourishment that accompanied the process.