Inside the Immortal Grotto-Heaven.
A silver-white sphere resembling a skull floated silently in midair.
Looking at the World-Casting Furnace before him, now sunk into silence, Zhang Yu smiled faintly.
"Finally."
Zhang Yu reached out and violently extracted the Grotto-Heaven Power from the first Refining Emptiness Power Corpse Part he had subdued. The silent World-Casting Furnace naturally had no power to resist him. Surging Grotto-Heaven Power instantly poured into Zhang Yu's body, causing the entire Immortal Grotto-Heaven to tremble faintly once more.
With each gentle tremor, the Immortal Grotto-Heaven seemed to grow anew. The volume of the entire space rapidly expanded, its length, width, and height gradually exceeding eleven kilometers.
Feeling the Immortal Grotto-Heaven grow once again, Zhang Yu nodded in satisfaction. "Subduing one Void Refining Corpse Piece really yields far more Grotto-Heaven Power than subduing ten Deity Transformation Corpse Pieces."
At the same time, Zhang Yu sensed a subtle, wondrous connection between himself and the World-Casting Furnace before him. The furnace was no longer crazed and now obeyed his commands completely.
"Then... start up."
"Ignite."
At that moment, tiny sparks rose within the core of the World-Casting Furnace.
At the same time, all the magical power in the Immortal Grotto-Heaven flowed through one Magical Power Circuit after another and was poured into the World-Casting Furnace.
Even Zhang Yu himself abruptly struck out with his palm, channeling his magical power into it.
Once the World-Casting Furnace was operating normally, it possessed astonishing magical power refining efficiency—enough to supply every piece of equipment in the entire Immortal Grotto-Heaven, with power to spare.
But starting it up and igniting it also consumed an enormous amount of magical power.
As wave after wave of magical power was forcefully infused into it, wisps of flame gradually burst from the World-Casting Furnace, like a sun rising