Zhang Chen took out the booklet given by Elder Gongsun, called "Divine Codex", which recorded some five elements and imperial spells, Zhang Chen didn't look at it much, but just selected two of them, one is called Black Flame, and the other is called Purple Thunder, which can release powerful spells that cannot be underestimated through the corresponding exercises.

After a small half day of practice, Hei Yan finally had a prototype, according to the exercises to run the Yuan force, concentrated on the palm of the right hand, slowly, the palm of the hand "poof" a cluster of black flames, like a small elf dancing in the palm of the hand, jumping and jumping.

As the exercises became more and more smooth, Hei Yan also became more and more violent, as if he wanted to get out of Zhang Chen's palm to devour everything around him, watching the fist-sized Hei Yan continue to beat, the corner of the young man's mouth showed a long-lost smile.

"Boom!"

With a loud bang, a big stone in the small courtyard was instantly torn apart, and even the fragments were scorched black, Zhang Chen withdrew his palm, and he was surprised that he didn't know how to describe this power, who knew that this black flame was so violent, it seems that this booklet given by Elder Gongsun is not simple!

The next practice was Purple Thunder, and the initial mastery of Purple Thunder was much slower than that of Black Flame, and it was not until it was dark that it was able to release a trace of thunder.

The palm of the hand is slightly curved, and five purple thunderbolts appear on the fingertips of the five fingers, even if the thunder is still relatively weak at this time, it can still be seen intertwined with each other, making bursts of "bang" sounds, but the momentum is not small.

After another two hours of practice, the purple thunder has begun to show its power, and the five dark purple thunderbolts with the thickness of the fingers "crackling" in the fingertips of the five fingers "crackling" straight up, although he can't hurt himself by casting spells, Zhang Chen can still feel the fury of the thunder.

"What if you release the black flame at the same time as the thunder?"

Such a bold idea popped into my head.

Just do it, the thunder between the five fingers is still raging, and the purple thunder casting has not stopped, and at the same time, the black flame technique is slowly unleashed.

"Snort!"

Suddenly, the original dark purple thunder turned dark black in an instant, and when I looked closely, I realized that it was a wisp of black flames on the thunder, which was very terrifying, but I didn't know how powerful it was.

He then blasted the combined body of Black Flame and Purple Thunder into the ground.

"Boom", "Boom!"

Suddenly, the entire courtyard shook, and the huge energy suddenly lifted the half-foot-thick bluestone floor, rolling up thick black smoke, and it was not until the black smoke cleared that Zhang Chen revealed an unbelievable scene.

It was a huge pit the size of one zhang and half a zhang deep, although the smoke and dust had dissipated, it could still be seen that the black flame purple thunder merge remaining on the pit wall was moving rapidly.

At this moment, Zhang Chen was both excited and scared for a while, but fortunately, the merger effect was completed very smoothly, if something went wrong, I really don't know what the consequences would be.

"Since it's a merger of Black Flame and Purple Thunder, you can't always call it a merger, right?"

"But what's it called?"

It's rewarding to be able to succeed in your attempt, but it's nerve-wracking to say that it's a name.

"That'...... It's called Black Thunder?"

"Eh, it doesn't sound good!"

"Lei Yan!"

"That's right! It's called Lei Yan!"

"With the properties of thunder and flame at the same time, it is most suitable to be called thunder flame!"

Releasing Lei Yan and appearing in his palm, Zhang Chen smiled contentedly, but he was thinking again, is this Lei Yan of any other use?

As far as the eye can see, there is a huge pit in his courtyard, and at this moment, there are still wisps of thunder, and the originally clean and neat bluestone courtyard has become this virtue, which really makes Zhang Chen cry and laugh.

"What a good thing that is!

......

Early the next morning, Zhang Chen had to spend thirty immortal crystals to hire a few miscellaneous disciples from the small market, and spent ten immortal crystals to buy some bluestone slabs, it was really his own small courtyard that was too miserable to see, and he couldn't go in without repairing it, fortunately he wasn't discovered by the little senior sister, otherwise he would have to say it again.

"Little junior brother, why didn't you go to the master today, you are still lazy to sleep in such a tight time! Come out and come out quickly!"

Just as Zhang Chen was helping the three miscellaneous disciples clean up the courtyard, he suddenly heard a voice not far away, who else could there be if it wasn't Senior Sister Liu Yuchan?

Zhang Chen couldn't help but hold his forehead! What is the matter, it seems that there is another reason for this matter.

"Senior sister, why are you here?"

Zhang Chen asked with a smile.

"Wow!

"What the hell are you going to blow up your own yard?"

Liu Yuchan asked with her mouth pointing to the giant pit.

"Ahem......! It's, I don't know what's going on, it's like this when I wake up!"

"Huh, what about the deceiver?"

"Say, what's the matter, is someone bullying the door?"

"Yes, yes, that's it, it's Elder Gongsun!"

"It's not bullying, it's just to add pressure to me!"

"Yes!

Zhang Chen's eyes rolled and he suddenly said.

"Hmm, why does Elder Gongsun want to put pressure on you!"

"Alas, it seems that the elder is also a painstaking man, his knife mouth is tofu-hearted, and he is not good at words, I know best, he is telling you that there are people outside the heavens and people outside tomorrow, and there may be a very strong opponent in this year-end competition, so you don't think about it, otherwise you will suffer a big loss!"

Liu Yuchan broke her fingers and explained as she walked.

"Uh-huh, it should be like this, I turned around and disappeared after a punch, I still wondered! I see! It seems that I am wrong to blame the elder!"

Zhang Chen also chimed in.

"You should have paid the wages of these people, then you are still helping out, what a stupid junior brother!"

"Let's go, follow me to the master, you're very short on time!"

"You guys! Do a good job! If you can't fix it, you will settle accounts with your employer!"

While pulling Zhang Chen outside, he shouted to the miscellaneous disciples.