A week later.

Sun and Moon Forest, Fangyuan Research Institute.

After deciding to accept the career assessment in January and participate in the national competition during the winter vacation, Fang Yuan began to prepare.

It's the end of September, and there's almost a hundred days left until January.

In these 100 days, Fang Yuan planned to stay in the Sun Moon Forest and conduct a 100-day special training with the elves.

In addition to training elves, there is also a task, which is to make the newly established Fang Yuan Research Institute clearly arranged.

On the side of Modu University, Fang Yuan was provided with a bunch of facilities for free, but on this basis, Fang Yuan had to add some things according to his own ideas.

Then there is the theoretical knowledge that Fang Yuan needs a relatively quiet environment to prepare for the vocational assessment......

The professional trainer assessment is very difficult and time-consuming, and the written test and the battle test are only part of it, and Fang Yuan must be fully prepared.

……

The Forest of the Sun and Moon, even after merging with the Earth, still has many eerie places.

The gloomy and bleak sunlight shrouded the area, and the ghostly figures and creepy cries of the sun and moon could give the illusion of the spirit realm.

In the labyrinthine forest, the stout and towering strange plants, and the insect elves lurking in the darkness all give people an ominous premonition......

Fortunately, this is only the internal environment of the Sun and Moon Forest, if the entire Sun and Moon Forest is like this, Fang Yuan is probably not in the mood to set up the research institute here.

"Mother-in-law......"

Looking at the special mountain cave in front of him, Fang Yuan shouted, and the gluttonous ghost next to Fang Yuan couldn't wait to rush out.

In the shadow of the cave, countless shadows jumped, and ghosts continued to form various patterns, emitting a terrible "yi" laugh.

At the same time, a ghostly fire appeared in the shadows, illuminating all directions, and the figure of an old woman with white hair wearing a purple cloth dress and holding a wooden cane walked out.

"Over the huh~~~"

The gluttonous man surrounded him, happy like a child.

Seeing the gluttonous ghost, the thousand-year-old Geng ghost was dim, and his wrinkled face also showed a smile.

Although he sent the greedy ghost out, Geng Ghost still had some reluctance in his heart, this is one of his most beloved offspring.

There is a reason why Fang Yuan agreed to let Fang Yuan establish a research institute near the Sun and Moon Forest, if Fang Yuan and they are often nearby, then the gluttonous will be able to come back from time to time.

"Bu Te ......" Fang Yuan's shoulder, Yi Bu carefully looked at the thousand-year-old Geng ghost who turned into the image of an old woman, even now, the thousand-year-old Geng ghost can still give it great pressure, if nothing else, the strength of this thousand-year-old Geng ghost has already exceeded the master level, and it may have top-level combat power.

"Not bad, not bad." However, looking at the glutton, under Fang Yuan's feeding, the gluttonous ghost is indeed much more nourished than in the secret realm of the Sun and Moon Forest, and his strength has also improved significantly.

Suddenly, the thousand-year-old Geng Ghost raised his head and asked, "What is the black flame that Luo Ke said?" ”

"A mutated ghost fire that burns life energy and soul energy." Fang Yuan took out an item.

A dark stone from the spirit realm.

"Glutton, demonstrate it."

Under Fang Yuan's instructions, the gluttonous ghost flew back from the thousand-year-old Geng ghost, holding the dark stone in his hand, and began to absorb the spiritual power in it.

The energy of spiritual power cannot be well absorbed with the physique of a glutton, and only a few elves such as the Night Demon Spirit can absorb and digest it, so the gluttonous can only be stored in the body.

However, although it cannot be digested, the gluttonous ghost can ignite it and use it as ghost fire fuel, just like the crystal lamp fire spirit and soul power.

According to the conclusion of the document that Fang Yuan saw in the Demon Great Library, the nature of spiritual power is extremely close to soul power, and it can also be used as soul power.

There are two kinds of carriers of spiritual power, one is the prop of "Cloth of the Spirit World", and the other is the dark stone produced in the Spirit World.

Fang Yuan took a picture of the spiritual cloth in addition to the keystone and the king's certificate in the research building.

But at this time, the cloth of the spirit world was gone, and this expensive evolution prop was directly burned by Fang Yuan and the glutton......

The spiritual cloth was first partially drained of spiritual power, and then it was burned by the black flame containing life energy......

When the ghost fire contained both life energy and spiritual power, it mutated again.

The ghost fire is still black, and it still has an inextinguishable nature, but it is much more powerful.

This shows that spiritual power can indeed be equated with soul energy...... Used to enhance Ghost Fire.

The ghost fire of the gluttonous ghost has developed two properties, the indestructible nature of burning life and the enhanced nature of burning soul, and these two properties are combined into one, and the black flame has become what it is now, the monstrous black flame of immortality and immortality.

After absorbing and storing the spiritual power of the Dark Stone, the greedy ghost once again mobilized the life energy stored in the body, and at the same time used the ghost fire to ignite the combined life energy and spiritual power.

The next moment!!

The gluttonous ghost raised his head suddenly, and the shadow where his eyes were focused suddenly appeared black flames, this black flame, swaying like a black lotus, ignited on the earth, spreading, scorching everything, and soon swept into a monstrous black flame, exuding a breath that was taboo for living beings......

It seems that if other elves touch it, not only will they be burned by the ghost's fire, but their own lives and souls will also be devoured together......

Call!!

Looking at the black flame, the thousand-year-old ghost crutch waved, and a purple ghost fire shot out, the purple and black ghost fire were intertwined, and the black flame once fell into the downwind, and there was a danger of being devoured, but it was never extinguished, about a few seconds later, the purple ghost fire that was out of the control of the thousand-year-old ghost was swept away by a cluster of black flames and became nourishment......

However, his face is strange, this black flame is indeed peculiar......

Fang Yuan judged that now the power of the black flame of the gluttonous ghost can already threaten the master-level elves, and the power can be equal to the victory or defeat of Eevee's Sun Fire, and in terms of weirdness, it is even better, because it has an indestructible nature.

However, it is a pity that the gluttonous ghost can still only control the form change of the black flame, but cannot control the extinguishing of the black flame, the latter is very important, and it determines whether the black flame can be used in regular battles, which has always been a problem that Fang Yuan wants to overcome.

"If you can control it perfectly, it's really a top-notch tool."

"It's a pity that this is not my area of expertise, and there is no way to help."

The thousand-year-old ghost shook his head, and gave a high degree of affirmation to the black flame, the black ghost fire perfectly fused the racial advantages of various ghost-based elves such as the ghost and the crystal lamp fire spirit, and the potential was very great, which was the ultimate embodiment of the ghost fire move.

"I believe that the gluttony can be successfully controlled in the future." Fang Yuan's heart is calm.

Can't control whether it's extinguished or not, or it's related to the control of life energy, evolving into Geng Ghost, after the life level is improved, this will definitely be better, Geng Ghost can't do it, it's super Geng Ghost, Fang Yuan believes that with the power of super evolution, it will definitely be able to perfectly control Black Flame.

"Actually, I'm here to visit you for another thing."