The perspective returns to the valley where Teacher Yuan is located.

The valley was now filled with weapons and elixirs.

Old Gan smiled as he looked at the tank he had meticulously crafted through weapon forging, as if he had acquired a beloved toy.

The entire tank was made of Nine Heavens Profound Iron, and its grade reached the level of a top-grade spiritual artifact.

Furthermore, although this tank looks the same as traditional tanks, its internal structure is completely different.

This tank can fly and dive into the ground, and it can launch attacks based on the five elements.

Compared to traditional tanks, this top-tier spirit weapon-level tank is powered by array patterns.

At the muzzle of the cannon, a Five Elements Array is inscribed, capable of absorbing the spiritual energy of the five elements in heaven and earth and compressing it into cannonballs.

According to the theory, as long as the spiritual energy continues, the cannonballs will never stop.

Teacher Yuan, who was standing nearby, exclaimed in amazement, "Old Gan, the tank you forged is truly amazing!"

"Where traditional tanks can't go, this tank can go; what traditional tanks can't do, this tank can do."

After examining it, the old man smiled and said, "There are still some flaws."

"In my plan, we should also add some spatial patterns to this tank."

"In this way, the tank can break through space and enter the enemy's territory. It's just a pity that the spatial patterns and formations are too difficult. I still don't have a clue."

Teacher Yuan, also quite interested, said, "How about we fire a shot and try it out?"

Old Gan nodded and said, "Then let's give it a try and see what needs to be improved!"

The two climbed into the tank; the space inside wasn't very large.

Elder Gan frowned and said, "This is a major flaw, because we haven't fully grasped the spatial array patterns yet, otherwise the space inside wouldn't be so small."

"We should add a Mustard Seed Technique here, so that there will be a huge space inside."

Teacher Yuan smiled and said, "You have to eat one bite at a time, and you have to do things one step at a time. There's no rush!"

Gan Lao then used his magic to activate the Five Elements Array Patterns, and then selected the Gold Array Pattern, which had the strongest penetrating power.

The entire tank began to glow and shine, as the golden spiritual energy in the world was absorbed and compressed.

A chilling aura descended, and the surrounding dinosaurs, sensing this, fled in terror.

"emission!"

A golden beam of light shot out from the massive cannon muzzle, instantly piercing through the mountain in front of them.

After everything calmed down, when Mr. Gan and Teacher Yuan checked, they found that a huge hole several meters in diameter had appeared in the mountain in front of them.

And it had already pierced through the entire mountain, its power was exceptionally astonishing.

Teacher Yuan's mouth dropped open; even this simple scene shocked him.

This version is still a test version. If the final version is developed, it will be a devastating weapon on the battlefield.

Old Gan was still somewhat dissatisfied, saying, "Actually, I planned to use this weapon in the starry sky."

"It's just that the array patterns in the starry sky are a bit difficult right now. I'll sort out the array patterns in the starry sky properly when I get back."

"At that time, this tank will be able to absorb the starlight and energy from the universe to launch itself."

Teacher Yuan gave a thumbs up and said, "That's awesome! Absolutely amazing!"

At this moment, Teacher Yuan discovered that another treasure box had appeared under her feet.

Gan Lao laughed and said, "Old Yuan, it has to be you again!"

Teacher Yuan laughed and said, "Same here, aren't you the same!"

At this moment, the old men looked down at each other and smiled as they saw that they were also standing on a treasure box.

Old Gan was the first to open the treasure box.

[Complete Guide to Formations: A summary from a master of formations in a fantasy world, containing all the formations he has mastered throughout his life, both orthodox and unorthodox.]

Teacher Yuan laughed and said, "Isn't this just like saying 'come on cue'?"

Old Gan's eyes shone brightly; he was now eager to learn.

If he were to complete this complete guide to formations, the power of his top-grade spiritual energy tank would likely increase even further.

However, Teacher Yuan hasn't opened the treasure box yet, and he's prepared to wait.

Teacher Yuan opened the treasure box, and inside was a section of gourd vine.

[An extraordinary gourd vine: from the world of Calabash Brothers. Plant it, and you will have seven grandsons with various abilities.]

[Big Brother (Red Brother): He is incredibly strong and can grow or shrink at will. He is the eldest of the seven Calabash Brothers.]

Second Brother (Orange Brother): Possesses far-seeing eyes and keen ears, enabling him to see events happening far away and hear sounds from afar.

Third Brother (Yellow Brother): Possesses a body of steel and can withstand attacks from swords, spears, and halberds without being harmed.

Fourth Brother (Green Brother): He can breathe fire and spew flames out of his mouth.

Fifth Brother (Green Brother): He can control water and can suck up all the water in the river.

Sixth Brother (Blue Brother): Possesses the ability to become invisible, able to appear and disappear without a trace, and is the most agile and intelligent of the seven brothers.

Seventh Brother (Purple Brother): Possesses a magic gourd that can suck in other people or objects.

Old Gan immediately joked, "Haha, Old Yuan, congratulations on having seven grandsons."

"But your seven grandsons are quite remarkable; each of them possesses extraordinary supernatural abilities."

Teacher Yuan smiled kindly and said, "I never expected to have seven grandsons in the world of activities. I must raise them well."

After saying that, he took the gourd vine and began to plant it, and even poured various kinds of spiritual water on it.

Then he took a stool and sat down to the side, quietly waiting for his seven grandsons to be born.

Old Gan also became interested and waited along with him.

As the spiritual energy accelerated, the gourd vine grew very quickly, and before long, seven gourds of different colors were hanging on the vine.

As the leaves of the gourd vines began to turn yellow, the largest red gourd could no longer bear the weight and fell down.

A chubby, fair-skinned baby wearing a bib jumped out of the gourd.

He also had a small red gourd on his head, which made him look quite cute.

As soon as the eldest child appeared, he called out to Teacher Yuan and the old man, "Grandpa, Second Grandpa!"

The other six gourds followed suit and fell to the ground one by one, and big, chubby babies emerged from them.

Immediately, Teacher Yuan and Old Man Gan heard a series of calls: "Grandpa, Second Grandpa!"

Teacher Yuan and Old Gan were both grinning from ear to ear; this was their happiest moment.

They were even happier than when the old man forged the top-grade magical tank.

The two of them picked up several dolls, their smiles radiant.

Old Gan gently patted the five children's bottoms and laughed, "These children are quite healthy. They will definitely grow up to be good young men."

The fifth child shook his head and said, "Second Grandfather, we need to consume that much spiritual energy to grow up."

The fifth child adorably gestured with his chubby little hands, making Teacher Yuan and the eldest brother laugh heartily.

At this moment, they didn't look like two big shots, but rather like two ordinary old men.