In front of True Martial Mountain.
Terrifying lightning bolts descended from the sky, with a purplish-black hue. Initially, the sword embryo had already formed, but after Ning Qi had invested all the flesh and blood of two Martial Saints, it transformed again. For this purpose, Ning himself personally used the Heavenly Thunder Technique to summon the lightning.
He had just stepped into the Martial Saint Realm, but from previously observing the heavenly thunder tempering the sword embryo, he had already gained some insight. Now, naturally, he took the Heavenly Thunder Technique a step further.
Boom!
During the tempering by heavenly thunder, the aura of the sword embryo became increasingly sharp.
Taoist Baishan felt a bit envious, as this kind of Spiritual Treasure not only surpassed the opportunity he gained this time, but even his True Profound Seal could not compare.
