Yu Feng had already gotten what he wanted, and the four of them had no reason to stay in Green City any longer, so they set off and continued to move forward.

On this day, a group of four people were resting in the woods and eating lunch, Long Ze saw Yan holding a round ball in his hand and studying it, and asked with some curiosity, "What is this?"

Yan shook his head and said, "I don't know, this is taken from the ancient tomb, it seems to be a ghost spirit, do you know what this is?"

Yu Feng smiled and complained, "Why do you always ask me? After taking the ball, as soon as he started it, Yu Feng immediately exclaimed: "It's so strong death, it's this thing that protects the body of the tomb owner from decaying, right?"

Yan said, "That's right, that's it, how about it? Can you see what it is?"

Yu Feng carefully looked at the ball, her perception slowly penetrated, but it was quickly blocked, and she threw the ball back to Yan, she took out a storage ring from the small bag, and with a shake, a pile of books fell down with a "crackle", all piled up as high as a hill.

Yu Feng pointed to the books on the ground: "This thing should be a ghost spirit object, these books record the vast majority of ghost spirit objects in this world, check them one by one, you should be able to find the information of this ball." ”

"Reading?" Yan looked weird, and so did Long Ze.

Fang Li asked, "What's the matter, why are you two so ugly?"

Yufeng said: "They don't like to read. This sentence was said very definitely, just look at their faces, the three words "don't like" were engraved directly on their faces, and they looked at Yan: "I warn you, Long Ze is still reasonable if you don't look at it, don't you want to be lazy, the ball is yours, you have to show me." With that, he threw him a book.

Yan took the book with a thickness of ten centimeters, and on the cover it was written "The Eleventh Book of Ghost Spiritual Objects" Cold sweat flowed on his forehead, from childhood to adulthood, his least favorite thing was to read books, but, "Hey・・・・・・" sighed, resigned himself to open the cover, check the catalog, and first exclude some of the things he knew and those that did not meet the conditions, so that the scope of finding them would be smaller.

The four of them are eating and reading books at the same time, in fact, reading books is also one of the jobs of the Holy Spirit Master, because there are many kinds of Holy Spirits, and it is impossible for a Holy Spirit Master to know all the Holy Spirits, so he gathers all the knowledge of the Holy Spirit Master, constantly compiles, revises, and compiles them into books, and even if the Holy Spirit Master has never seen them with his own eyes, he can also know a lot of Holy Spirits, and he needs a lot of materials for promotion on the way to practice.

The Holy Spirit Master is a group of poor people who are chased by time, cultivating mystical power, cultivating and taking care of the Holy Spirit, practicing everywhere, enriching knowledge, and finally fighting for various reasons, and they can't relax for a moment before they become top powerhouses.

The four of them read the book for a day, their eyes cramped, and finally found the information of the round ball spiritual object: the ghost crown, itself is in the cemetery or the battlefield, where there are many dead, because of the absorption of a large amount of dead gas to form the yin stone, and then artificially add a large number of materials to refine it to form a prototype, at this time it will have some effects, can be used to protect the corpse from decay, or strengthen the Holy Spirit, but if you want to strengthen the effect better, you also need to absorb a large amount of dead air, and finally form a round ball, which has the appearance of a crown inside, this is the final form of the ghost crown, and it can also achieve the best strengthening effect。

After reading this information, Yan was overjoyed and said, "It's really a good thing, it's just right to use it to strengthen the Yin Fire Ghost King." ”

The three of them stood aside, Yan summoned the Yin Fire Ghost King and asked it to hold the Ghost Crown, and Yan Zai carefully dragged the energy of the Ghost Crown into the Yin Fire Ghost King's body.

Gradually, the ghost crown merged into the body of the Yin Fire Ghost King, and the body surface of the Yin Fire Ghost King began to emit a burst of black and gold light, and the light became more and more abundant, and gradually wrapped the Yin Fire Ghost King, forming a light cocoon.

Seeing this, Yan breathed a sigh of relief, he knew that the fusion had been successful, and now he would wait for the Yin Fire Ghost King to complete his strengthening and transformation, and then come out of the cocoon on his own.

Because the Yin Fire Ghost King couldn't send it back to the spirit cave in this state, the four of them could only stay where they were and wait.

This wait is three days, and during this time, Yan reads books while taking care of the Yin Fire Ghost King, wanting to gain more knowledge from books and know more spiritual objects, even if he didn't like to read books before, he has to read them now.

Long Ze and Yu Feng were building equipment for their Holy Spirit, and Fang Li was busy mixing various medicinal liquids in case of emergency, and the three of them were very busy.

Time passed little by little, and finally on the third night, the light cocoon began to tremble, and then cracks appeared, and this continued for a few minutes, and finally the light cocoon burst into a piercing light.

The four of them couldn't stand the strong light, they closed their eyes one after another, those rays of light spread, some of them merged into the bodies of the four people, and the four of them suddenly felt a burst of cold qi attacking, thinking that these lights should be transformed by the remnants of the ghost crown, among which Yan felt the strongest.

When the four of them opened their eyes again, the Yin Fire Ghost King had already appeared in front of them, and its appearance at this time was very different from before, although it could only see the head, not the body, but now its face was not as hideous as before, but it looked majestic and domineering, especially with an extra crown on its head, which was not originally there, the king's qi was more obvious and more powerful, maybe it can be called a Yin Fire Ghost Emperor now.

The Yin Fire Ghost Emperor thanked Yan in human language, "Thank you, Yan!"

"Can you speak?" The three of them were surprised, because the previous Yin Fire Ghost King didn't know the human language.

Yan smiled: "Needless to say, we don't need that kind of thing between us, not to mention that this is also my duty." What do you think of it now?What's the difference?" Yan wasn't at all surprised that the Yin Fire Ghost Emperor could speak human language.

"Hmm・・・・・・" the Yin Fire Ghost Emperor said thoughtfully, "What's the difference? I seem to have evolved two levels and mastered new skills. ”

"What?" This time, even Yan couldn't avoid it, and the four of them were taken aback.

Yu Feng said: "It has evolved two levels, its innate level is the lord level, plus two levels is the prince level, this ghost crown is really a good thing, it is really the most suitable spiritual object for the Yin Fire Ghost King." ”

"Yes!" Yan smiled very happily, the Yin Fire Ghost King had safely absorbed the energy and evolved two levels, which was indeed worth rejoicing. He summoned the Yin Fire Ghost Emperor back to the Spirit Cave and let it rest well, and he was finally relieved that he could sleep well.