The originally silver thunder crystals, stimulated by Thunder God's Hammer, instantly turned purple-gold, surging toward the hammer like a raging river.
These bolts of thunder were clearly the most primordial lightning of nature, true power of heaven and earth, drawn in by the thunder pool through immense power and imprisoned within it.
Now, all the thunder power this thunder pool had accumulated over tens of millions of years was handed over to Chen Xiao, devoured by Thunder God's Hammer.
Rumble!
Lightning flashed as streaks of purple-gold thunder formed vast, boundless rivers, which Thunder God's Hammer swallowed completely. Purple-gold radiance flickered as the hammer continued to evolve.
Though Thunder God's Hammer was a supreme treasure of heavenly tribulation, it was currently the weakest magic treasure in Chen Xiao's possession. It could not compare with the Starry Sky Battle Banner, or even the Eight Treasures of All Beings.
But Chen Xiao knew that once Thunder God's Hammer matured, it would possess the power to destroy heaven and earth. It might even rival the Thunder Virtue Heavenly Book and command all lightning.
Yet although the thunder pool's power was formidable, it was not enough to advance Thunder God's Hammer to completion. If the previous Thunder God's Hammer had been equivalent to a Primordial Unity Golden Immortal artifact, then after devouring all this lightning, it would advance another step, reaching the grade of a Nine Heavens Mystic Immortal artifact.
After all, this thunder power was simply too immense. The thunder pool had been left behind by the City Lord of All Beings as the source that powered that immense Heavenly Court Palace. One could easily imagine how terrifying it was.
Everything proceeded silently, and Chen Xiao attracted no one's attention.
During this time, however, members of the Parting Sorrow Sect entered the treasury again,