Cave Refuge

At that time, Dong Tianyu had a Cave which was just like that. At that time, Dong Tianyu could actually be said to be the World Cornerstone of the Cave. As long as Dong Tianyu did not die, it was estimated that the Cave could also exist forever. However, once Dong Tianyu died, the Cave would also collapse instantly and ultimately disappear.

After learning about this, Dong Tianyu initially wanted to act as this World Cornerstone himself. After all, the Cave was entirely his own, so if possible, there was actually no problem with him being the World Cornerstone.

Regarding becoming the Cave's World Cornerstone, if he were to die and a new World Cornerstone couldn't be found in time, the space within the Cave might very well be completely destroyed.

But if it really came to that point, it would not affect Dong Tianyu at all. After all, once he was dead, why would he, like a Treasure Delivery Boy, hand over the Cave he had meticulously built to the enemy who killed him.

It also wasn't anything that could just become a World Cornerstone; if the Cave wasn't completely dependent on Dong Tianyu, he wouldn't possibly become the World Cornerstone of the Cave. Compared to other items that could become World Cornerstones in any plane, Dong Tianyu could only be the World Cornerstone of his own Cave. If it were another plane or space, Dong Tianyu wouldn't qualify to be the World Cornerstone of any other plane or space.

Unfortunately, once Dong Tianyu thoroughly understood the situation regarding the World Cornerstone, he immediately abandoned the idea of becoming one and allowing the Cave to evolve immediately.

After becoming a World Cornerstone, not only would there be no impact, but rather—in the world to which it belonged—someone would become a Child of Destiny. Some not too excessive ideas could mostly turn into reality as wished.

Moreover, as long as he didn't seek death, after becoming a World Cornerstone, his lifespan would essentially be bound to the world. In theory, as long as the world didn't perish, the items or creatures that became World Cornerstones would generally become immortal existences.

And most crucially, after becoming a World Cornerstone, if there wasn't a special sealing Barrier nearby, once he sustained a fatal injury, the world, to ensure its own safety was not affected, would necessarily intervene to rescue and could immediately teleport the target to an absolutely safe place.

Of course, even though there were so many benefits, the reason Dong Tianyu ultimately gave up on becoming a World Cornerstone was that once he became the Cave's World Cornerstone, he would only be able to stay inside the Cave forever and would never be able to leave it.

Actually, for most ordinary people, such a restriction was no different from not having one at all. After all, many people, throughout their lifetimes, couldn't even leave their own planets, let alone their planes.

Yet faced with such a limitation, Dong Tianyu ultimately resolutely rejected it. Having seen a fascinating world and still having the opportunity to explore even more marvelous worlds, one couldn't have both fish and bear's paws; Dong Tianyu was bound to give up the fish for the bear's paws.

If possible, Dong Tianyu also wanted to, like the adults online, choose all, but unfortunately, Dong Tianyu at that time was still a baby of over three hundred months and could only answer multiple-choice questions.

After confirming that he wouldn't become the World Cornerstone of the Cave, Dong Tianyu started considering how to choose a World Cornerstone.

Although the World Cornerstone could be changed, and had no impact on quantity—it should be known that the World Cornerstone was like the foundation laid during building construction. A deeper or shallower foundation could both support a building, but with a deeper foundation, skyscrapers could be built, while with a shallower foundation, only two-story houses could be built.

However, compared to the foundation laid during house construction—once building was completed, it couldn't be modified anymore—World Cornerstones, even if damaged, could still be repaired by replacing or adding new World Cornerstones.

Like the foundational stones of the Primordial world, which were often damaged in numerous battles, the first was Cycle Mountain, left by Pangu when he divided heaven and earth. Following Cycle Mountain's collapse, the less potent but voluminous Five-Divine Beasts were used.

Moreover, in West Fantasy there was the World Tree. After its destruction, for the world's stability, Ymir was chosen as the new World cornerstone. If the name Ymir seems unfamiliar, surely his nickname is not; he is known as the Mortal Giant Python that encircles the world.

Of course, dealing with such high-end matters was difficult for Dong Tianyu, but this evolution of the Cave, after all, was like evolving from a Plane Space into a minor thousand-worlds plane—akin to a mortal becoming an Immortal, a leap most would find daunting.

Dong Tianyu could also spend Survival Points in the Cave to purchase those items, but even choosing the cheapest World Tree seed required an exorbitant number of Survival Points, a figure daunting to most.

Thus, Dong Tianyu had to temporarily abandon the thought of evolving the Cave and leave it to fate. Even if nothing on Blue Star could serve as a world cornerstone, perhaps some useful items could be found among the Otherworldly Creatures when they descend again.

After ensuring everything was in order, Dong Tianyu finally left the Cave, never expecting that a whim visit would result in such an extraordinary adventure.

During this trip, not only did Dong Tianyu gain a special constitution that greatly improved his cultivation efficiency, but the flora and fauna living in the Cave also encountered their own miracles, pushing the evolution of the Cave to the level of Great Perfection.

Although he didn't trigger immediate evolution of the Cave, he learned about the items needed for future evolution. More importantly, Dong Tianyu realized that his Cave genuinely had the potential to evolve into a minor thousand-worlds plane.

Truthfully, if Dong Tianyu's Cave could evolve into a minor thousand-worlds plane, he might choose to bring his parents into his own minor world to live. To prevent his parents from feeling lonely, he might invite more survivors, not just his parents, into his personal minor world.

After tallying the benefits from this adventure, Dong Tianyu finally decided to stick to his original plan and check out the situation in the city mentioned in the Imperial Court's summoning order.

As a hub connecting five provinces and not far from Pengcheng, there was a city mentioned in the summoning order that was under construction.

Before reaching this city, Dong Tianyu thought that if the situation there met his expectations, he would even use an airplane to bring his parents and some relatives over.

After all, besides having similar lifestyles, perhaps his parents could also rediscover old familial or friendly ties there.

Although Dong Tianyu couldn't fly a plane or recruit a pilot, he had transformed the airplane into a Magical Weapon in the Cave, so using the plane did not require a traditional pilot, just enough Spirit Power. With sufficient Spirit Power, the plane could circle the Earth continuously without any issues.

Although he had transformed the plane into a Magical Weapon, Dong Tianyu preferred Sword Flight over flying a plane. Though traveling by plane might be more comfortable, its large size made it an obvious target wherever it went.

Thus, compared to flying by plane, Dong Tianyu preferred Sword Flight.