On an unnamed planet in the northern reaches of the Immortal Domain, Qin Feng's original body sat cross-legged in cultivation.
The Immortal Domain brimmed with immortal spiritual energy. He could absorb all of it into his Chaos Space to help it recover further.
"Cultivating an inner world isn't that simple. I'll have to come up with something if I want others to successfully open their own inner worlds," Qin Feng muttered, his original body sitting cross-legged on an unnamed planet in the Immortal Domain.
The most crucial step in practicing the inner-world method he had created was opening a small world within one's body.
Regardless of its size, that small world had to be brought into existence-a process of creating something from nothing.
But accomplishing that was easier said than done. Simply explaining the cultivation method would not allow someone to master it; other aids were needed.
Opening a world out of thin air within one's body without any assistance was unrealistic, so something resembling a world seed would be necessary in the early stages.
Much like a Dao-Joining Seed, this world seed would allow a cultivator to open a small world within their body, then let it grow continuously.
If enough people practiced this cultivation method in the future, they might work out a way to open an inner world without a world seed.
But getting started was difficult, and everything was still in the exploratory stage. How, then, could he produce the all-important world seeds?
Qin Feng thought of a solution: one step in his Chaos Space's future development would be to find a world tree sapling-or, failing that, some branches from a world tree would do.
He would then plant and nurture it in his Chaos Space. The world tree and the Chaos Space could complement each other, and eventually, the tree could bear world seeds, allowing him to spread this cultivation system.
This cultivation method was destined to have few practitioners, because its consumption of resources was simply too immense.
Qin Feng made a rough calculation: growing an inner world to the Supreme Realm would mean bringing it to the scale of a small world.
It would barely suffice to pool the cultivation resources of several hundred ordinary Supremes. In the future shattered Nine Heavens and Ten Earths, each heaven or earth could raise at most one or two inheritors. An entire great sect could not support even a single inner-world cultivator.
He still had to get a world tree sapling. He had no idea whether any young Supreme in this era possessed one within their body. If someone did, he would find a way to obtain it; otherwise, he could only search for one himself.
But a world tree sapling could only be encountered by chance, never sought at will. It ranked among the very finest Dao-Joining Immortal Seeds. Even the Immortal Domain, the Foreign Realm, and the Primeval Ancient Realm each had only a single fully grown world tree.
One might not appear for several eras. It came down entirely to luck.
The only world tree sapling Qin Feng knew for certain had appeared was the one belonging to Tianzi, the Ten-Crown King, at the end of the future chaotic ancient era.
Wait, perhaps it doesn't have to be a world tree sapling. Other naturally born heaven and earth spirit roots might help too.
Qin Feng thought of an alternative: if he truly could not find a world tree sapling, he might as well approach the problem from another angle.
There were quite a few supreme experts in this world who had taken human form from heaven and earth spirit roots. The renowned Pan King of the Immortal Domain, for instance, was originally an Innate Peaches of Immortality Tree.
The Peaches of Immortality borne by his true body were extraordinarily precious. An Extreme Dao Supreme who ate one could leap straight to becoming a True Immortal, with an effect no weaker than the Immortal Medicine of Longevity.
True Immortals who attained their cultivation by consuming medicine might be the weakest of their kind, but they were still True Immortals.
There was also the Willow Deity, who could repeatedly undergo nirvana and be reborn. The Willow Deity's true body was no ordinary willow tree, but an Innate Divine Willow.
In the future, the Willow Deity would suffer a great calamity-an ambush by three Immortal King-level experts from the Immortal Domain.
Perhaps he could find a way to obtain a Willow Stump, a Willow Branch, or a Willow Tree Seed from the Willow Deity, then plant it in his Chaos World as a temporary substitute for a world tree.
Once he found a world tree sapling or branches from a true world tree in the future, he could try merging these two powerful heaven and earth spirit roots and see whether an even stronger spirit root could emerge.
As for why he would not choose Pan King, Qin Feng was currently only an expert at the Extreme Dao Supreme level. He did not have nearly enough standing to ask an Immortal King to cut off a piece of his true body and give it to him.
That would be as absurd as a middle-class person with a little savings suddenly running up to a top billionaire and asking for one of his arms.
So the Willow Deity was his only option.
Once the Willow Deity had been crippled, he would find a way to reap some benefits.
As one of the Primeval Ancient Realm's finest Supreme-level geniuses, he would surely earn the Willow Deity's goodwill if he saved her at a critical moment. Asking her for some bodily tissue afterward should not be much of a problem.
As for planting the Willow Deity's true body directly in his Chaos World, Qin Feng would not dare-Mama Willow was crucial to the future Desolate Heaven Emperor's growth. He could not disrupt that.
If I end up wiping the Desolate Heaven Emperor out of existence, who'll fight the uncanny? Who'll camp their spawn point?
At most, he would gain a few benefits and become a familiar face to the Willow Deity.
It was now the end of the immortal ancient era. Once the Foreign Realm Army had completely withdrawn, the Willow Deity would return. In her boundless fury, she would charge into the Foreign Realm, fighting her way in and out seven times, before finally being ambushed by three bastards from the Immortal Domain and left grievously wounded, on the brink of death.
All of this would happen within a hundred years. He had every opportunity to get involved.
That was far more worthwhile than gambling on his luck while searching for a world tree sapling. The Willow Deity's potential was immense, and she was the easiest option to work with.
Qin Feng had already made his decision. When the Willow Deity was ambushed, he would step in.
A month later, Qin Feng's avatar had fully recovered. His original body's consciousness entered the avatar, and he began his next move.
The Origin Lightning Pool he had collected remained sealed. Qin Feng did not intend to use the tribulation lightning liquid inside it-the Thunder Emperor, one of the Primeval Ten Fiends of the Primeval Ancient Realm, had already fallen by this point.
He could find a way to obtain the Thunder Emperor Precious Technique. With it, he would be able to control the power of heavenly tribulations perfectly.
Besides that, tribulation lightning liquid could also be used to cultivate the Indestructible Scripture.
Qin Feng began planning his next moves.
At this point in time, the Indestructible Scripture should be in the Old Heavenly Horned Ant's possession.
This elder had the most offspring among the Primordial Ten Fiends. He was known to have a daughter and a son, both of whom had been killed by He Wushuang.
At the end of the immortal ancient era, He Wushuang had attacked the Immortal Ancient Realm as a young Supreme of the Foreign Realm, hunting down the Ancient Realm's young Supremes. That brat should have been in the Void Dao Realm-at the absolute most, he could not have surpassed the Self-Slash realm.
If he had been in the Supreme Realm, he would not have perished together with the Young Desolate Heaven Emperor-Desolate had been in the Void Dao Realm at the time.
Though called a young Supreme, he was merely a promising seedling with the potential to become a Supreme.
Perhaps he could use those two little girls as bait to lure He Wushuang out, then capture the brat himself and find a way to obtain the Indestructible Scripture.
He could also earn some goodwill from the Heavenly Horned Ant along the way-three birds with one arrow.