Standing within layers upon layers of space, Lin Yuan took strides that left galaxies trailing behind him with each step.
"The Main Universe... truly vast..."
Lin Yuan marveled internally while he hurried on his way, carefully taking in the experience.
What he referred to as 'vast' was not superficially so, but contained infinite spatial layers, a profound depth of space.
Ninth Rank Evolvers, even having reached the Myriad Heavy Realm, the spatial layers developed within their Inner World are merely in the tens of millions.
But the Main Universe?
Tens of millions of spatial layers aren't even comparable to a hair of the Main Universe.
"No wonder after so many years, clashes between powerful races have caused minimal damage to the Main World; with such a terrifying foundation, who would care about the attack of ants?"
That was Lin Yuan's silent thought.
Humans and other races confined their warfare to designated battlefields. It wasn't because they could destroy the Main Universe, but because they feared the repercussions of their clashes might affect those planet-based Secret Realms. Enjoy exclusive adventures from empire
The essence of war is the struggle for resources. Without resources, what is there to fight for?
As for the Eternal Spatial Rifts caused by the attacks of Supreme Beings? When measured in meters, to the Main Universe, they probably wouldn't even compare to the space between cells.
Occupying thousands of Spatial Layers, Lin Yuan noticed fragments of weapons floating within a few of them.
"They are of little value."
Lin Yuan glanced at them and lacked interest.
For countless millennia, one strong individual after another had fought and perished across the countless Spatial Layers. Whether it ended in victory, mutual destruction, or death, their personal belongings would scatter within a certain Spatial Layer.
That was the origin of the weapon fragments Lin Yuan had seen.
Mostly they were just scrap, but sometimes there were valuable finds, although exceedingly rare.
Many Ninth Rank strong beings roamed various Spatial Layers with the hope of 'picking up treasures', perhaps in some unknown layer there lay a forgotten treasure?
Beyond these, deep within the many layers of the Main Universe were born numerous Cosmic Secret Realms.
These Cosmic Secret Realms would, in due time with the movement of the Main Universe, briefly establish pathways to the outside world, like the 'Xuan Huang' Secret Realm the Chikun Star Lord had once visited, located in an incredibly deep spatial layer.
Lin Yuan took dozens of steps in succession, traversing tens of thousands of light-years in the span of five to six breaths.
"Hmm... Some of my mental energy has been depleted..."
Lin Yuan immediately noticed the change in his condition. Having grasped the Complete Space Rules, he could employ the Great Transference Skill.
However, using the Great Transference Skill would consume mental energy.
Lin Yuan estimated that if he continued at this rate of mental energy consumption and took a few tens of thousands more steps, he might start to feel fatigued.
Normal Ninth and Tenth Rank Evolvers wouldn't allow themselves to become fatigued lightly, as it would affect their ability to perform.
Previously, when Nalan, the Deputy Tower Master, used the Great Transference Skill in succession to traverse star regions and come to Chikun Main Star, bringing Lin Yuan the 'Soul-Settling Pearl', it was by command of a Supreme Being.
And it was also related to the strength of Nalan himself.
The stronger one was, the lesser the feeling of fatigue.
"I might as well just take the cosmic spaceship, even if it's slower."
With a thought from Lin Yuan, the Layer A cosmic spaceship he had once bought appeared in front of him.
Lin Yuan's expression suddenly changed.
"My mental energy consumption is recovering quickly?"
Mental energy depletion naturally recovers, but at this moment, Lin Yuan could distinctly feel that the recovery rate was far faster than natural.
"Coming from my Inner World... the World Tree?"
Lin Yuan's consciousness descended into his Inner World and found a World Tree over a hundred meters tall swaying its branches. Strands of light green power, following the World Tree's own essence, melded into the Inner World.
Then, the World's power operated within the Inner World, nourishing Lin Yuan's flesh, soul, and spirit will, with the light green power aiding in the recovery of his mental energy depletion.
"So the World Tree has this use too?"
A smile crossed Lin Yuan's face; recovery from physical and soul depletion was relatively easy, though it came at a certain cost.
But for mental energy depletion... so far, the known treasures that recover mental energy for humankind all possess extremely high value.
Even if Lin Yuan could afford to purchase them, he wouldn't use them for something like traveling.
"With this, I can continue using the Great Transference Skill to travel... just need to reduce the distance of each step a bit."
If Lin Yuan maintained a pace of thousands of light-years in a single step, even with the World Tree's compensation, the rate of mental energy recovery would still be slower than its depletion.
But Lin Yuan could simply slow down his travel pace, for instance, from one step being thousands of light-years to one step being eight hundred light-years, or five hundred light-years?
Smaller steps mean reduced consumption.
Even so, this pace of travel still far exceeded riding on cosmic ships. Travel by wormholes required cooldown time, and even the best cosmic ships could only reduce this cooldown, but there was still a wait after each shuttle.
Yet, the Great Transference Skill didn't require any cooldown.
"One step of nine hundred light-years... no, that won't do...."
"One step of eight hundred light-years... still not good enough..."
"One step of seven hundred light-years... no, that won't do either..."
Lin Yuan started to experiment, seeking a balance point between the rates of depletion and recovery.
Lin Yuan determined that when traveling at a rate of five hundred thirty light-years per step, the depletion of his mental energy equaled the sum of his own recovery rate and the World Tree's restoration pace.
That is to say, as long as Lin Yuan maintained a rate of five hundred thirty light-years per step, he would never feel any fatigue, no matter how long he traveled.
Because the slight mental energy that was just spent would be replenished at the same rate.