The Ice Fire Giant Dragon born within the volcano was the first form of Wu Bao, refined by Lin Yi using the Devouring Heart.
Earlier, in the West Mountain Southern Domain, Lin Yi had captured several four-star Demon Kings to feed Wu Bao. Although this gave Wu Bao several additional transformation forms, it did not bring about any qualitative change.
That changed when Lin Yi received a sketch of himself from Elder Chen, one left behind by Yu Huaqing, who possessed the talent of foresight.
It depicted him riding an Ice Fire Dragon and knocking on the gates outside the Heaven-Piercing City Gate beyond Apocalypse Continent.
After seeing the painting, Lin Yi guessed that if he wanted Wu Bao, which possessed the body of a Fire Dragon, to advance to Demigod level, he might need to offer up the Demigod-level Frost Dragon Pearl he had obtained from the Heavenly Ladder Trial.
This Frost Dragon Pearl was one of the few Demigod materials Lin Yi possessed, but considering that it could allow Wu Bao to advance, he gave it to Wu Bao without hesitation.
However, after swallowing the Frost Dragon Pearl, Wu Bao clearly could not digest the Frigid Ice bloodline within it in a short time. Soon afterward, the ice and fire within its body clashed and fell out of balance, with the frost attribute gaining the upper hand.
To help Wu Bao break through successfully, Lin Yi placed it inside a volcano in the Spirit Vine World, using the external blazing sunfire to promote balance between the bloodlines within its body.
Originally, this transformation would have taken an extremely long time, but after Lin Yi obtained the Phoenix Heart Fruit, he fed one to Wu Bao as well.
Compared to the Purple Grade Dragon Pearl left behind by a