Although he had the foundation laid by the Flame Emperor Body Tempering Art, the effort required to use Great Emperor Mysterious Wasteland's Furnace Body Tempering Art to turn his own physique into a furnace for forging a sword was beyond what ordinary people could imagine.
Thus, even with Fairy Lingyue guiding him every step of the way, Xu Taiping still spent ten years before he could barely manage to turn his physique into a furnace.
Next, Xu Taiping spent another ten years refining the piece of outer heaven meteoric iron Fairy Zhu Songyu had given him and the Demon Emperor's remnant body.
And the method of refining them was to "eat" them.
Indeed, he first swallowed one piece of outer heaven meteoric iron together with the Demon Emperor's remnant body, then used the Furnace Body Tempering Art, taking his stomach, one of his five internal organs, as a crucible to melt the meteoric iron and the Demon Emperor's remnant body into "molten iron."
He then sent this mass of molten iron into his Qi Mansion to condense it into a sword embryo.
Finally, he used his heart as a hammer to temper the sword embryo through a thousand hammerings and a hundred refinings.
"Boom!..."
Just then, accompanied by a tremendous sound that shook heaven and earth, a surge of qi and blood filled with savage, murderous intent spread outward from the Dragon-Trapping Tower.
Fairy Lingyue immediately asked Xu Taiping, her face filled with delight:
"Taiping, is this Demon-Sealing Sword ready to leave the furnace?"
Inside the Dragon-Trapping Tower, Xu Taiping immediately replied:
"That's right. I'm sending the sword into my liver and gallbladder to quench it and unseal its edge. Once the quenching and unsealing are complete, the sword will be finished!"
As Xu Taiping spoke, peals of sword cries