Rumble rumble~
Inside the refining chamber, a swirling mass of dark clouds had appeared above the Life-Giving Creation Cauldron. Countless hair-thin arcs of lightning darted through the cloud mass, occasionally rumbling with thunder.
This phenomenon had already lasted a full three hours. Not only had it shown no sign of dissipating, it was instead growing ever more intense.
Yet Wang Chen, seated before the great cauldron, seemed blind to it. All of his focus and power were poured into the treasure cauldron before him.
The upgrade of the Dragon Abyss Sword had reached its final critical juncture. The slightest mistake would render all previous effort worthless.
The losses would be incalculable!
Crack!
A bolt of lightning suddenly struck the lid of the Life-Giving Creation Cauldron.
The treasure cauldron did not budge in the slightest, but Wang Chen's entire body shuddered as though struck by lightning, and his aura became faintly disordered.
Though this tribulation lightning appeared unremarkable, the power contained within it was exceedingly terrifying, and Wang Chen had borne most of it himself.
He had no choice. He had to protect the Flying Sword inside the cauldron from being affected by external forces.
When a true spirit emerged, tribulation lightning arose on its own!
This was Wang Chen's first time refining a fourth-tier Spirit Treasure. Encountering such a situation merely by upgrading an existing Magic Treasure was an exceptionally rare occurrence.
Crack! Crack!
One tribulation bolt after another descended, each more powerful than the last.
Without hesitation, Wang Chen activated the power of his Nascent Soul and poured it into the Life-Giving Creation Cauldron, forcefully withstanding bolt after bolt of destructive lightning.
Each defense consumed an enormous amount of his strength.
An ordinary early stage Nascent Soul cultivator would already be impressive if they could endure two or three