After four hours of repeated tempering, the sword embryo under Lei Jun's hammer was refined again and again, although he already had a C-level comprehensive evaluation, he was still tired and sweating, but Lei Jun's expression became more and more excited, because now there was only one last step left!

"Yu Hao, give me the crystal nucleus!" Lei Jun inserted the two-meter-long heavy sword into the flames, and the Nine Dragons Thunder Gang Fire scorched it red again, but this time it did not melt quickly, and it was obvious that it had changed in essence.

Yu Hao didn't dare to hesitate, and immediately threw the crystal nucleus in the box.

"Fire!" As soon as Lei Jun's arm was raised, the Nine Dragons Thunder Gang Fire turned into the appearance of a thunder dragon again, it seemed to have life, and bit the crystal nucleus in its mouth.

"Click!" The crystal nucleus was suddenly bitten and shattered, and a stream of blue-purple liquid flowed down, instantly penetrating into the sword body.

"Poof!" The sword was lifted into the air by an invisible force, and the hammer was tempered on the giant sword on its own as if it had come to life, and Lei Jun's hand kept changing its gestures.

Yu Hao looked at it, and there were blue-purple lines on the surface of the heavy sword, these lines were not only good-looking, but even changed the internal structure of the heavy sword, if Luo Xiao was here, he would definitely be able to find that these lines were like some profound runes.

"Why does that hammer seem to be alive?" Yu Hao stared at the self-flying hammer, and he actually felt a breath of life from the beginning.

"You didn't feel wrong, it does have life!" Lei Jun wiped the sweat from his forehead, the heavy sword was already in the final fusion of the flames, and his work was over.

Lei Jun stretched out a hand, and the hammer flew back into his hand in an instant.

"I added a metal life called ELS to it, the full name should be called extraterrestrial mutation metal life, if you have seen the theatrical version of Gundam OO, you should know this thing, it can be said to be metal, it can also be said to be life."

"Tut-tut, there is even such a thing." As a Gundam fan, Yu Hao naturally knows what ELS is, and it is said that when this metal life is assimilated with the human body, it can even transform the human body, so that the cells of the human body can also be ELS, so as to achieve the effect of immortality.

"But this thing is too expensive, I saved up several exam credits to get this little, and the headmaster is still limited to purchases, I'm afraid only in that world can I get a lot of ELS metal."

Suddenly, a thunderous sound resounded throughout the alchemy room, and the Nine Dragons Thunder Gang Fire seemed to have completed its mission, turning into a thunder dragon that hovered in the air for a while, and then disappeared completely.

"Alright, done! Check it out! Lei Jun sat down on the chair, his physical strength was consumed a lot, although the evaluation of this sword was not very high, but the Mithril and the copper of the first mountain were all B-grade or even A-grade metals, even Yuan He was very struggling.

Yu Hao walked towards the heavy sword, the whole body of the heavy sword is purple-black translucent crystal, there are two dragon-shaped lines on both sides of the sword body, the length reaches 220 cm, the blade is 15 cm wide, the thickest part is 3 cm, and the weight is just 100 catties after removing impurities.

He stroked the heavy sword as if it were a work of art, and his hand involuntarily held on the hilt.

"Heavy sword, unnamed, made of purple cloud gold, mythril, copper of the first mountain, D-grade thunder crystal nucleus, smelted by the Nine Dragons Thunder Gang Fire, evaluation: E."

"It's actually E-grade!" Yu Hao was pleasantly surprised.

"There's nothing strange about it, after all, the materials you use are not ordinary, but now you can't exert its full power, let's name it first!" Lei Jun said.

"Since it is refined by the Nine Dragons Thunder Gang Fire, it is called the Zigang Heavy Sword!"

As soon as Yu Hao's words fell, the name of this heavy sword changed from "unnamed" to "Zigang heavy sword".

It was not difficult to lift this heavy sword with his current strength of eight times that of an ordinary person, but it was quite cumbersome to wield, and I was afraid that he would be exhausted in a few strokes.

"Boom!" The qi on Yu Hao's body burst out, the red aura burned fiercely, and Lei Jun's body not far away shook, and the aura on Yu Hao's body had already exceeded the level of F-level.

"It turned out to be a stunt, no wonder he was able to earn so many points as a freshman, with the real strength of the F grade, and the few exams in the first semester of his freshman year were simply his attempts to earn tuition!" Lei Jun finally knew where Yu Hao's strength and financial resources came from.

But he can also see that although this state is powerful and has almost doubled his overall physical quality, it also has a price, otherwise it would be too rebellious.

Under the surge of power, the heavy sword in Yu Hao's hand also became extremely handy, and that weight combined with his strength, he was even confident that he could kill an F-class creature in seconds!

He poured the qi on his body into the sword, and the surface of the heavy sword actually jumped up one after another arcs of thunder, it could not only carry Yu Hao's incomparably violent qi, but also make it even more terrifying.

"Senior, how do you pull out this sword?" Yu Hao returned to his normal state and began to study the sword.

"You just need to infuse a trace of the energy in your body into the hilt of the sword!"

Yu Hao tried it according to Lei Jun's words, and sure enough, his qi was like a key, a ray of light flowed in the sword body, and a 120 cm long ancient sword-shaped sub-sword was withdrawn from it.

It is like an amethyst made of general transparency, the weight is only about ten catties, and the sharpness is even greater than that of the mother sword, Yu Hao can also use qi to urge it to exert more powerful power.

He inserted the sub-sword back, and suddenly the two swords merged into one again, and this sub-sword may be his killer weapon at a critical time!

"Great!" Yu Hao was extremely satisfied with this Zigang heavy sword, although it cost nearly 50,000 credits, it was definitely worth the money, and he even thought of the picture of himself killing all sides in the next exam.

"Senior Lei Jun, thank you!" Yu Hao put away the Zigang heavy sword and bowed to Lei Gang seriously, this heavy sword not only improved his combat effectiveness, but also increased his life-saving ability in disguise.

"Hahaha, you're welcome, we just take what we need, if you have any business in the future, you can introduce it to me, and I will give you a discount!" 10,000 credits to the hand grenade gang is also quite happy.

The two exchanged a few words, Lei Jun also needed to rest for a while, and Yu Hao left the Alchemy Academy.

Not long after leaving, Yu Hao's school emblem sounded, and it was Bai Mengmeng looking for him.

"Teacher Bai, is there something wrong?" Yu Hao asked.

"There's a task assigned by the student council from the principal, are you interested?"