"For Mysterious Immortals, the World Heart's greatest use lay in strengthening their worlds and improving their chances of breaking through to Golden Immortal. For me, however, its ability to evolve a world mattered more."
Even now, his world had expanded to less than 50,000 li.
And the farther a world expanded, the slower its expansion became.
Li Xian had originally estimated that expanding his world to 50,000 li would cost 10,000 Chaos Crystals and take three thousand years.
Beyond that, reaching 60,000, 70,000, and 80,000 li would consume ever more time and resources.
If he truly sought to push it to 90,000 or 100,000 li, the resources required would reach a million or several million Chaos Crystals, while the time would soar to three or four eras, even eight or nine.
But with the World Heart...
Besides strengthening his world and giving it greater resistance to impacts, it could rapidly expand the world to the limit that the Great Daos within him could support, drastically shortening several or even a dozen eras of cultivation and saving several million Chaos Crystals in one stroke.
As he thought, he drew the World Heart directly into his internal world.
Instantly, countless ripples spread from the World Heart, expanding in concentric circles.
The Great Dao Power within Li Xian spread out as well, intertwining with the World Heart and absorbing those ripples, striking the world's boundaries wave after wave and expanding its limits.
In an instant, the world began spreading outward at a speed visible to the naked eye.
At this rate, it could probably expand by more than 10,000 li in just the first few years.
A few hundred years would be enough to expand the world beyond 90,000 li.
After putting away the World Heart, he glanced at the deep-blue flame, but