The flying spiritual instrument he crafted was a large disc shaped like a UFO spaceship.
With a diameter of 158 meters and a height of 28 meters,
it had seven internal levels, comprising a total of 3,050 rooms of various sizes.
If the entire family were to relocate, without considering how many people per room,
these 3,050 rooms alone could accommodate a significant number of people.
Each level had a central hall with a diameter of 50 meters, nearly as large as five basketball courts.
A six-level hall could hold up to ten thousand people.
The seventh level lacked a central hall because it housed the control room and energy chamber of the flying instrument.
The external alloy metal defense of the flying instrument was of top-quality spiritual instrument grade, not forged as a single piece but assembled from tens of thousands of alloy metal parts, making it impossible for even a sacred treasure to destroy it quickly.
On the alloy metal of this flying instrument, Guo Feilong also carved defensive formations from shield talismans. Once the defensive formation was activated, the flying instrument would be enveloped in a light screen.
The strongest defensive effect of the formation's light screen could withstand attacks from Golden Elixir stage cultivators.
However, the size of this flying instrument was enormous.
Whether it was the flight formation or the activation of the defensive formation's light screen, it consumed a significant amount of spirit stones every second.
Additionally, this flying instrument could also serve as an attack instrument; with its top-quality spiritual instrument grade, it could directly ram into enemies.
With its massive size, terrifying weight, and the impact force generated during high-speed flight, even Golden Elixir stage cultivators would be knocked away.
It could be said that once this gigantic flying instrument was activated, all enemies ahead would have to make way.
If they didn't, even Golden Elixir stage cultivators would be knocked away, unable to stop it.
Guo Feilong also designed a powerful spell attack capability for this flying instrument, allowing it to unleash the power of lightning to attack enemies.
The lightning attack could reach the level of late Foundation Establishment stage at Great Perfection. Don't underestimate this; the lightning power of this flying instrument also had an intermediate killer move.
That was his humanoid lifebound sacred treasure, which could combine the power of tribulation lightning with the lightning spell attack on the flying instrument to attack enemies, with immense power.
How immense?
Guo Feilong didn't know either.
It could at least rival the attack of a late Golden Elixir stage cultivator at Great Perfection.
The functionality of this flying instrument was excellent, but the manufacturing cost was also enormous.
The alloy metal raw materials alone cost 100 million low-quality spirit stones,
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while a low-quality sacred treasure only cost three to four million low-quality spirit stones.
Adding in other rare refinement materials and the labor costs for carving various formations, the total cost amounted to 200 million low-quality spirit stones.
His current level in refinement and formations, as well as alchemy and talisman crafting, was at the grandmaster level.
If others hired him to carve formations, the fees would be extremely expensive.
One must remain low-key; he was already at the grandmaster level in alchemy, having suddenly made great strides in his skills.
If he were to reveal his true level in refinement, formations, and talisman crafting,
it wouldn't just cause a sensation but would lead to countless cultivation forces speculating about him.
They would think he had obtained some treasure or inheritance and come to kill him for it.
Of course, in reality, he had indeed obtained treasures and inheritances.
The Family Fortune Cauldron was a treasure, and the Yellow Emperor's inheritance was an inheritance.
In fact, if talismans weren't limited by his own cultivation stage, preventing him from crafting Golden Elixir stage talismans,
he would have already crafted a pile of Golden Elixir stage talismans to dominate the Arctic Continent's cultivation world.
Which Golden Elixir stage cultivator would dare provoke him? He could just throw a bunch of talismans at them, and who could withstand it?
Anyone seeing him kill a Golden Elixir with talismans would just say he was rich and willful, without thinking much else.
It was Guo Feilong's first time crafting a flying instrument, and he didn't know how fast it could fly; he needed to test it.
The Guo family's Heavenly Abode couldn't test the speed of the flying instrument because it was only about 360 li in size.
Swish!
Guo Feilong patted his storage bag, and a green light fell onto the gigantic flying instrument.
In the next instant,
the enormous flying instrument shrank to the size of dust and was stored in the storage bag.
As long as the internal space of the storage bag was large enough, it could store any item.
If the item was connected to the ground, it couldn't be stored.
Moments later,
Guo Feilong emerged from the Guo family's Heavenly Abode, stepping on a white cloud to fly into the sky. A mid-Foundation Establishment stage cultivator could only fly to a certain height, then it was like hitting a wall, unable to fly higher.
For a Qi Refining stage cultivator, stepping on a white cloud could only reach a certain height, unable to fly higher.
When he reached a certain height, Guo Feilong patted his storage bag and released the flying instrument. At this height, people on the ground couldn't see the flying instrument.
Even Foundation Establishment stage cultivators didn't have such distant vision; only higher-stage cultivators could see clearly.
Guo Feilong waved a hand, casting a spell onto the flying instrument, activating its formations. The control room door at the top automatically opened.
Guo Feilong entered the control room, using his divine sense to control the formation disk inside. In the next moment, the gigantic flying instrument began to fly rapidly.
The flying instrument was entirely metal, with no glass windows. Guo Feilong's perception of the outside world came entirely from his divine sense.
The primary purpose of crafting this flying instrument was for escape, with the flight and hovering formations being the most numerous.
Half an hour later, Guo Feilong concluded the flying speed test of the instrument.
The maximum speed could reach a certain distance per hour, about three times faster than Golden Elixir stage flying spiritual beasts.
However, the spirit stone consumption was enormous; in just half an hour of flight, it consumed 300,000 low-quality spirit stones.
If it flew at maximum speed for 24 hours, it would consume 7.2 million spirit stones, equivalent to the cost of two low-quality sacred treasures, which wasn't something an ordinary cultivator could afford.
Nevertheless, the speed was indeed impressive, capable of flying 600,000 li in 24 hours. In less than 10 hours, it could fly from the Guo family's Heavenly Abode to the Northern Borders Continent's cultivation world.
In the future, if anything unexpected happened in the Arctic Continent's cultivation world, he could take his family and relocate to the Northern Borders Continent's cultivation world.
After returning to the Guo family's forbidden zone, Guo Feilong named the flying instrument "Mobile Fortress," meaning a movable fortress.
The Mobile Fortress was intended for the family's future relocation, as its massive size and spirit stone consumption made it unsuitable for one or two people to use for escape.
There was still a lot of alloy metal left after crafting the Mobile Fortress.
Next, Guo Feilong planned to use the remaining alloy metal to craft several smaller flying instruments.
Time flew by, and in the blink of an eye, a month had passed. Guo Feilong had crafted five small flying instruments.
Each small flying instrument had a diameter of eight meters and a height of two and a half meters. Apart from the control room, there were no other rooms, but it could accommodate five or six people.
The speed of the small flying instruments wasn't as fast as the large one. The maximum speed per hour was less than that of the large flying instrument, the Mobile Fortress.
However, the speed was already excellent, and Golden Elixir stage cultivators couldn't catch up. Only Elemental Infant stage experts could.
The cost of the small flying instruments was also lower, at 300,000 low-quality spirit stones each.
A top-quality spiritual instrument guard tower cost only 100,000 spirit stones, and the small flying instruments were a hundred times smaller than the guard tower, yet three times the price.
The reason lay in the different metal prices; the flying instruments used a lot of high-grade metal ores, making them expensive.
Moreover, once a top-quality spiritual instrument guard tower was built, it couldn't be moved.
But his top-quality small flying instruments could be stored in a storage bag and carried around.
Among his wives and concubines, Wang Yuyan had Earth Grade spiritual roots, with great potential in the future, and she was tight-lipped, able to keep secrets.
At night, while enjoying himself in Wang Yuyan's room, Guo Feilong gave her a token to enter and exit the forbidden zone. If he wasn't in the Arctic Continent's cultivation world in the future,
and something happened to the Spirit Creek Sect, he instructed Wang Yuyan not to worry about anything else, but to load the family members into the Mobile Fortress and immediately fly to the Northern Borders Continent's cultivation world.
Guo Feilong had stored 80 million low-quality spirit stones in the Mobile Fortress's energy chamber, enough for the Mobile Fortress to fly at full speed for ten days and nights.
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