More than a thousand years passed.
Within the Cloud-Touching Vine Divine Kingdom.
On the boundless grasslands.
Yun He sat cross-legged, a Mixed Hole ten centimeters in diameter slowly rotating in his right palm.
"The Twin Vortex Domain has been fully digested."
Yun He lowered his head to look at the Mixed Hole in his palm.
Its diameter had now grown to around twelve light-years, and its power had increased at least another two or threefold.
After devouring and digesting the Twin Vortex Domain, the space within the Mixed Hole had also become more stable and powerful.
The various chaotic energies within it had grown even more terrifying.
The Twin Vortex Domain had existed on the Outer Domain Battlefield for endless ages, devouring untold amounts of energy and matter over that time.
Everything it had accumulated over those long ages had now become nourishment for the Mixed Hole.
Over these thousand-plus years, not only had the Mixed Hole grown more powerful, but Yun He had also strengthened his two supreme arts, Black Hole Strangulation and Instant Radiance, bringing them infinitely close to the level of a Universe Master's Ultimate Secret Technique.
They were merely infinitely close, having touched the threshold.
There was a fundamental distinction between a Universe Master's Ultimate Secret Technique, a Top Universe Overlord's Ultimate Secret Technique, and a Universe Master's peak supreme art. It was not a barrier that could be broken through so easily.
Taking that final step and achieving a qualitative transformation could be easy, or it could be difficult.
With sufficient accumulation, or a flash of inspiration, the breakthrough might happen in an instant.
Otherwise, if one became stuck, it would be no surprise to remain stuck for endless ages.
After all, a Universe Master's Ultimate Secret Technique was generally a level of technique used