After staying in the Boundless City for a few days, the disciples of the Hidden Sword Academy returned to Dragon City on the Lingyun Flying Boat, while Tang Yin hid in the back mountain of the academy to develop the Kui Bao of the Seal.

Xuan Popping Bead is the first achievement he developed.

As the name suggests, the attack principle of the Xuan Explosion Bead is no different from that of Lei Zhenzi, but the power effect is dozens or even hundreds of times that of the latter.

After a few days of studying the True Yuan Pearl, Tang Yin finally found the secret that the True Yuan Pearls could store the True Yuan Pearl, and further studied the results of this research, and finally made the True Yuan Pearl's breath restrained and became a new offensive weapon.

Moreover, this kind of Xuan Explosion Bead can only be made by Tang Yin himself, and others can't imitate it if they want to. Because they don't have the dragon ascension recipe to help.

If you want to make a Xuan Burst Bead, you first need a "container" that can store a large amount of true elements, and this "container" must not be too large.

In the end, Tang Yin chose the abandoned spiritual source.

After other sword masters absorb the spiritual energy in the spiritual source, the spiritual source will turn into powder, but the spiritual source refined by the Ascending Dragon Technique can perfectly retain the shell.

Therefore, all it took was for Tang Yin to inject his true essence into the discarded spirit source shell, and then seal it to make a powerful Xuan Explosion Bead.

When it is time to use it, directly throw the Xuan Explosion Bead out, and release the true element in the Seal Broken Spirit Source, which can burst out with powerful lethality.

The lethal power of this kind of Xuan Explosion Bead is equivalent to the realm when Tang Yin injected the True Yuan, which also means that when he is one star and nine tribulations, the Xuan Explosion Bead created is equivalent to the full force of his Nine Tribulations realm.

In the future, Tang Yin's strength will increase greatly, and the Xuan Explosion Bead he created can also burst out with greater killing power.

Walking out of the residence, Tang Yin came to the Seven Leaves Valley in the back mountain, and found a remote forest, after the Xuan Explosion Bead was made, it had not been experimented, and it was difficult to say whether the actual power was so strong in theory.

There was no one around, Tang Yin threw out the Xuan Explosion Bead in his hand and hit a big tree, boom! Burst with great power.

Surrounded by thick trees, they were instantly blown into powder, and the effect was really comparable to Tang Yin's full blow.

"Tsk, boy, what are you throwing out, it looks quite powerful!"

Tang Yin was stunned at the scene after the explosion of the Xuan Explosion Bead, and suddenly a voice appeared behind him, and he was suddenly frightened, but when he turned around, he found that the person who came was still an acquaintance.

"Mr. Boda, why are you?"

Tang Yin was slightly stunned when he saw the comer, the other party was the rickety old man who traded black stone eggs with him in Jialan City, but later Tang Yin learned that this person was actually the Supreme Elder of the mountain behind the Hidden Sword Academy.

"Isn't that me!"

Mr. Boda was very short and sloppy, and when the other party spoke, he had to tilt his head, which looked very strange.

"I don't know that Elder Taishang is coming, the disciple is far away, forgive your sins!"

"Okay, boy Tang, don't fake it here. Now that you know the identity of the old man, why didn't you think to go to see my old man after returning to the academy for so many days? Don't you know that the old man is tormented by this injury? Mr. Boda was slightly annoyed.

"Uh......"

"Since you Tang Yin is busy, the old man has to be cheeky and take the initiative to seek medical treatment." Mr. Boda's sentence can be regarded as explaining why he appeared in the Seven Leaves Valley, obviously for Tang Yin.

"It's all the disciple's fault, now ask the elder to follow the disciple back to the dormitory, and after checking, you can refine the medicine!" Tang Yin is quite confident in his alchemy technique, and the other party is obviously corpse poison into the bones, if it is not for the advanced cultivation, I am afraid that the bones of the whole body will not be eroded by corpse poison.

In this regard, Mr. Boda has no opinion, the sooner he is cured, the sooner he will be relieved of the painful torment. But on the way back to the dormitory, Mr. Boda still did not forget his curiosity about the Xuan Popping Beads.

Tang Yin replied lightly: "That little thing is just a gadget made by a disciple when he is bored, and it is difficult to get into the hall of elegance." Don't mention it! ”

Mr. Boda said about gadgets? It's strange to believe you! That kind of power is a hundred times better than explosive weapons such as thunder shocks and thunderbolts, and it is just a gadget developed when you are bored? But Tang Yin didn't want to say more, he couldn't force the other party, after all, he had to ask him now, and it was not good to behave too much.

In Tang Yin's room, Tang Yin said to Mr. Boda: "Great Elder, please take off your clothes and lie on your stomach with your back hunched!" ”

Mr. Boda was stunned for a moment, and said angrily: "What do you kid want to do?" The old decay would rather be tortured to death by corpse poison than betray chrysanthemums! ”

"Uh......"

Tang Yin is speechless, chrysanthemum? The ghost is interested in you, the old immortal chrysanthemum, and Ben Shao doesn't have a habit of breaking sleeves!

"The elder misunderstood, the disciple just wanted to see where the corpse poison had reached the spine."

Listening to the other party's explanation, Mr. Boda's old face was rarely red, fortunately, if you have to sell the chrysanthemum to cure the disease, the old man would rather die!

"It was better to do so." Mr. Boda said coldly; "Although the old decay is old, it is still a pink daisy, don't attack suddenly, let the old decay lose its old age!"

"Don't worry, Ben Shao is not interested in your old chrysanthemum!" Tang Yin saw that the other party had obediently taken off his shirt, so he turned behind him and was shocked.

The scene in front of him can be described as shocking, one of the other party's vertebrae has been corroded by corpse poison, and he can still walk with his waist hunched like this, and even use his own combat skills, the perseverance of this great elder can be described as amazing.

While Tang Yin admired the other party, he also filtered in his mind, Mr. Boda's corpse poison was already very serious, and the ordinary detoxification pill was useless, and he had to use the Three Immortals to break the Erdan.

"Alright, let's put on our clothes!" Tang Yin said.

Seeing Tang Yin's frowns, Mr. Boda couldn't help but feel a tense in his heart, and asked, "It's gone?" ”

Tang Yin shook his head and said, "Youzhi! But it's more difficult, and the medicinal herbs are hard to find! ”

"What herbs?" When Mr. Boda heard that his wounds were still healed, his face immediately became happy. Hurriedly asked: "No matter what kind of medicinal herbs, as long as you can name them, the old man will be responsible for finding them!" ”

Tang Yin nodded, treating the other party, naturally he would not let himself be put on spiritual materials, so he said: "There are a lot of spiritual materials needed, I will make a list for you." ”

Tang Yin raised his pen and listed the names of dozens of heaven and earth spiritual materials in a row, among which there were naturally spiritual materials that were specially used to treat Elder Boda, and there were also some spiritual materials that he had been looking for but could not collect.

The reason why he writes so much about spiritual materials is not because Tang Yin is greedy, but because he doesn't want others to spy on the formula of alchemy from the types of spiritual materials.

Mr. Boda looked at the list of spiritual materials listed by the other party, and couldn't help but tremble his eyebrows three times with anger, where is this still a prescription for curing diseases and saving people, it is clearly a list of robbing pharmacies, if the spiritual materials on this list are all together, it is not worth 100 million but 80 million gold coins.