Three months later, Leo returned to the Tower of Elements.
Amidst the cheers of the Gulu Beast, Benji's enormous true form landed on the open ground in front of the Wizard Tower.
"How many more babies have you had these past few years, my little ones?"
Yaoyao the Gulu Beast, was the first to rush into the wizard tower, eager to see the newly born Gulu Beast cubs.
Amidst the child's soft Gulu Gulu, Yaoyao's eerie, raucous laughter echoed. Yaoyao never tired of making the newborn Gulu Beast cry.
"Not bad, not bad. A total of 15 new Gulu Beast have been born, plus one Level 2. All 7 fourth-generation Gulu Beast have reached adulthood, with four entering Level 1, and the remaining three will also enter Level 1 in a few years."
Leo was gone for four years, traversing two worlds, experiencing countless battles, and killing countless lives. It wouldn't be an exaggeration to say that he was mentally exhausted.
Now back in his wizard tower, although there were no luxurious buildings or spectacular sights, Leo felt surprisingly calm as he looked at the Fire Essence Flower swaying in the wind like flames and the noisy Gulu Beast.
Leo led the group of Gulu Beast into the Wizard Tower and said to Benji, "The fourth generation has reached adulthood, but unfortunately there aren't enough of them—only seven. You first three generations need to continue your efforts, as the reproduction of subsequent offspring will become increasingly difficult. You must pay close attention."
"... Yes, Lord Leo."
Benji was speechless at Leo's words. Leo was always pressuring them to have children, but they really couldn't conceive.
"Stop playing!"
Watching Yaoyao tease the newborn little Gulu Beast, making them cry one by one before stopping, Leo simply grabbed Yaoyao and tossed her away, disappearing without a trace.
"Very good, healthy, and exceptionally talented. Keep up the good work. If things get really bad, I'll prescribe some medicine for you."
To date, from the first generation of 110 Gulu Beast to now, more than a hundred years later, the number of offspring is still less than 300.
Pregnancy was difficult, and reproduction was slow, so Leo even considered taking unethical means.
"Lord Leo, please don't! We can have children, we can have children!"
When Benji heard that Leo was going to prepare the medicine, he became anxious. This kind of thing couldn't be solved by just preparing medicine.
Besides, if they actually concocted the medicine, it wouldn't do them a good reputation. People would think that their Gulu Beast were incompetent.
What a disgrace!
"Alright, I'll inject the fourth generation into the blood of the Goddess of Darkness over the next few days, and I'll also inject the other generations that haven't been enhanced yet."
"Thank you, Lord Leo."
Leo looked around, recorded the data of the newborn Gulu Beast, and slowly walked towards the library on the second floor.
Once seated in my usual spot, my mind started racing, beginning with a summary of my trip to the Purple Flame Academy.
"The contract with Samatchi has ended, which can be considered the end of a karmic entanglement. I wonder if Nigel can advance to the next level. If he can become Official Wizard, he might be useful in the future."
"Something feels off about what's going on in Tiger World. I hope I'm wrong."
"We still have 175 years of rest time. We'll strive to advance to level two on the elemental side within 75 years."
"No matter who calls me, I won't go out. Wasting time is unacceptable."
"Read a book, read a book."
Time seemed to bypass Leo the moment he picked up the book; people are most handsome when they are studying.
Leo wasn't completely ignoring other things; for example, the experiment of injecting the fourth generation of Gulu Beast with the blood of the Goddess of Darkness continued.
Besides this matter, what else could prompt Leo to ask was for Charlotte's help in finding the people he had written on the note, or their descendants.
The reply was that no one had been found. They had found many people with the same name, but their age and experience did not match the person Leo was looking for at all.
Earth was shattered, resulting in the loss of a large population. Later, it underwent a memory cleansing and was relocated to another planet. With only a few names and some experiences remaining, it's impossible to find any trace of these individuals.
Leo couldn't go to the planet currently inhabited by humans on Earth, so he could only listen to the information Charlotte sent back. After expressing his gratitude, Leo still hoped that he could take the initiative to go there himself.
"Master Leo, no, it won't work. I applied to the higher-ups after you made that request last time, but it wasn't approved," Charlotte said with a wry smile.
"Alright, thank you for your help. By the way, about the hydrogen bomb..."
"Huh? Master Leo, what did you say? The signal is bad, I can't hear you, I'll hang up now."
When Leo mentioned the word "hydrogen bomb," Charlotte was immediately scared away, and she even used a tone of voice that imitated that of an Earthling.
Didn't he know that the signal from the crystal ball wasn't an electromagnetic signal from Earth, and therefore there was no issue with signal strength?
Of course he knew, and that's precisely why he didn't give Leo a chance to speak and immediately hung up the crystal ball.
There was nothing he could do; he simply couldn't fulfill the request Leo made.
Leo originally wanted to develop a few more hydrogen bombs; these things are incredibly powerful and perfect for murder and robbery.
With the atomic bomb increasingly failing to meet Leo's needs, the hydrogen bomb was the best option. However, the Green Cottage's control over the hydrogen bomb was too strict, to the point that even a butler like Charlotte was reluctant to say a word.
As for whether it's possible to Hand-Rubbed Atomic Bomb Hand-Rubbed Hydrogen Bomb like an atomic bomb, Leo said that the current level is still a bit lacking, but it's not impossible to try. What if it succeeds?
The spirit of the older generation tells us that it's better to have your own resources than to rely on your parents. You can't get a full meal by begging others; only by relying on your own hands can you create your own world.
We don't really know much about the theoretical knowledge of hydrogen bombs; we can only rely on our current knowledge to deduce it ourselves.
Leo secretly noted down another task in his wizard's notebook: to Hand-Rubbed Hydrogen Bomb.
Looking at his wizard's notebook, Li Xi realized he hadn't completed a single task. This feeling of not having finished his homework made Leo extremely uncomfortable.
"Our primary task is to complete the advancement to the second-level elemental side; we'll deal with the rest later."
Advancing to the second level of elemental magic was like a mountain blocking Leo's path; he had to move it.
"The advancement from level one to level two in Elemental Wizard is a profound mastery of energy. As Elemental Body Refinement Wizard, I can be even bolder, directly enduring nuclear fission reactions with my physical body, no longer needing a shadow as a fission medium."
"To accomplish this task, the first requirement is physical strength."
Leo's physical attributes have already reached the peak of Level Two Body Refinement Wizard, with stamina of 190 and strength of 194. As for the attack multiplier he can unleash, it has reached 35 times, only 5 times away from Leo's goal of 40 times.
"Since I don't want to waste time going out anyway, I'll just activate the passive amplification to the maximum."
The Electric Shock Rune Array on his body, the Gravity Rune Array, the nuclear fission accelerated evolution radiation inside his shadow, the seven elemental passive buff rune arrays, Frost Rune Array were all activated to the maximum to stimulate the rapid evolution of his body's cells at maximum power.
The moment he activated the magic array on his body to its maximum, Leo's face turned deathly pale. Apart from his still bright eyes, one could tell he was weak even without sensing Leo presence.
He couldn't help but let out muffled groans from his nose, each one telling of the unimaginable torment he was enduring every moment.
His body beneath the wizard's robes twitched intermittently; this was because he couldn't control his muscles, causing them to twitch in a defensive manner.
All of this effort was worthwhile, because Leo could feel subtle changes in his body with every breath.
This is a process of countless cells rapidly renewing themselves; each new generation of cells is slightly stronger than the original ones.
The enhancement of a single cell may not be noticeable, but when all the cells in the body are changing and strengthening, the significance is different.
Previously, when not in combat, although Leo would activate the rune array on his body to passively enhance himself, it would never be as destructive and indiscriminate as it is now.
The price to pay for this is that while the body may appear to be strengthened in a short period of time, it will inevitably leave serious injuries in the long run, requiring several times the effort to repair them.
However, Leo is currently in a hurry to meet the prerequisites for elemental advancement, so minor injuries are insignificant.
"Excellent, the evolution speed has increased threefold, and the time required for physical enhancement to reach 40 times its original value has been reduced to one-third."
"As for the enormous energy released during nuclear fission, it needs to be contained by an electromagnetic field. This depends on my mastery of the lightning elemental power."
When Li Xi was granted a drop of blood by the God of Giants Kampas in the Giant World, which unlocked the second layer of his Bloodline Power, he also enhanced his mastery of the lightning elemental attribute. At that moment, Leo knew that his advancement to the second level of the elemental realm would be greatly accelerated.
In reality, the knowledge Leo acquired on Earth wasn't particularly profound, which is normal. He only obtained a university degree, so much of the knowledge he gained was superficial and basic.
In order to pass the exam, I only have a general idea...
Little did he expect that these superficial understandings would one day become the key to his success.
When Leo first embarked on his wizarding journey, he had already made a plan: to use his physical body to contain nuclear fission, with his powerful physique serving as the fundamental carrier for the fission.
This ensures that all energy is directly controlled by the body without any loss.
However, there are two problems. One is that the powerful energy released during nuclear fission can instantly tear apart flesh, even the strong body of the Thunderstorm Giant cannot withstand it. Therefore, Leo thought of the method that Earth used when humans wanted to Artificial Sun.
That is to control powerful energy with strong magnetic force; as long as you control strong magnetic force, you can control powerful fission energy.
Strong magnetic force is like a pair of giant hands, able to mold the energy of nuclear fission explosion however it wants.
The strong magnetic force comes from Leo's mastery of the energy of the thunder element. Electricity generates magnetism, and magnetism generates electricity; this is a basic concept learned in junior high school.