Liu Xi looked up and found that he and Qiu Changsheng were in a deep and lengthy closed stone corridor.

On the walls on both sides of the stone gallery, every ten meters, there was a strangely shaped stone sculpture, the stone sculpture did not recognize what it was, it was in the shape of an animal, and it opened its mouth with a bloody mouth and a basketball-sized flame burning in its mouth.

Obviously, these stone carvings are lampholders, and the sound of "rubbing" is the sound of the flame being lit.

One by one, the lamp holders spontaneously combusted without wind, burning all the way along the deep stone corridor to the depths that the two could not see.

The surroundings were as bright as day, but there was not a single trace of smoke.

Liu Xi and Qiu Changsheng glanced at each other, Qiu Changsheng walked to the stone wall to observe the stone carving, and Liu Xi drew a big circle on the ground with his sword, surrounding the seventeen participating Taoist priests.

When the tip of the sword left the ground, the ground was firmly formed, and an invisible wall of qi firmly protected the seventeen people inside.

Liu Xi thought about it again, pinched a sword trick, and the Qinglian Sword flew up with a hum, circling around the circle that was drawn as a prison.

"Do you see what's coming?" Liu Xi walked up to Qiu Changsheng and asked.

Qiu Changsheng nodded: "I can see a little." ”

"Which point?"

"I can see that it's an ancient tomb. Qiu Changsheng said.

Liu Xi: "......"

This waste!

Liu Xi simply stepped forward to observe, the stone wall was paved with cyan stone bricks, and the patterns of flowers, birds, fish and insects were carved on it. Each stone brick is the same size, the same thickness, and even the same material.

The stone bricks should be thousands of years old, but the craftsmanship is no worse than the tiles pasted in modern buildings. But when it comes to artistic value, these stone tiles are worth many times more than those fine tiles today.

The stone sculpture is a human-like statue, but with a huge tail and a large mouth that splits directly to the edge of the ear. The stone carving's mouth was bigger than its entire body.

However, at this time, the stone carving's mouth was open and burning with a raging flame, exuding a very faint fragrance.

Liu Xi smelled it, this smell is not unpleasant, on the contrary, it gives people a fresh and pleasant feeling.

Liu Xi was sure that she had never smelled anything like this.

With Liu Xi and Qiu Changsheng's knowledge, they didn't even know what kind of animal the stone carving was, and they hadn't smelled the smell of flames, so there was only one explanation.

These are all things that only exist on Earth.

Only the things that are native to the earth, Liu Xi and Qiu Changsheng, the two old monsters, will not be recognized.

Liu Xi waved his hand, and a nameless wind blew, blowing out the raging flames.

Under the extinguished flame, there was a solidified milky white oil, and it was this solidified oil that exuded a fresh fragrance.

With a "rub", the extinguished flame burned again, and a fragrance emanated from the flame.

This miraculous oil has a very low ignition point, as long as there is oxygen and the temperature is above 10 degrees, it can basically burn.

"It's ...... What oil?"

Liu Xi stared at the flames for a while, and saw that the milky white solidified grease did not seem to have changed, and the volume had not decreased.

She roughly calculated that if this mass of grease was to burn out, it would take at least two thousand years of continuous burning.

And this underground tomb, if there is no outsider to break into, the oxygen in the tomb will run out, and the flame will extinguish itself.

It is not until the next time the tomb is opened again, bringing fresh air, that the flame is lit again.

If it continues to burn and extinguish like this, it may not be impossible to burn for tens of thousands of years.

Qiu Changsheng said: "I haven't seen it, it seems to have some demonic power, and it seems to have some witch breath." ”

"I see, it's the merman's grease. ”

Liu Xi suddenly remembered that she had seen some of them, which seemed to record the furnishings in the ancient tombs.

One of them is the everlasting lamp, under which a huge amount of oil is stored, which can ensure that the everlasting lamp will continue to burn for hundreds of thousands of years.

Presumably, the lampholders on the stone walls on both sides of these aisles in front of you are also similar to the lanterns.

Most of the grease written about the ever-bright lantern is the grease of the East China Sea mermaids.

Because the mermaid lives in the cold seabed all year round, there is a thick oil under the skin to keep warm. And because it has to resist the cold, the merman's grease ignition point is very low.

As long as the merman exercises hard for a while, the fat in the whole body will emit heat to help the merman resist the cold of the seabed.

And because sharks have been living on the bottom of the sea, they will not spontaneously combust because the ignition point of the body oil is too low.

"What is a merman?" Qiu Changsheng asked puzzled.

Liu Xi glanced at him with disdain, whether in the cultivation world or in the end of the world, the scumbags will always be despised by the scholars.

"I can't explain it to you, so you can just assume that they are all fish demons. Liu Xi said.

"Fish demon?"

Qiu Changsheng glanced at the stone sculpture again and nodded: "It's also appropriate, it's indeed a fish demon." ”

"Do you remember what you told me about the origin of the Adept?" asked Liu Xi again.

Qiu Changsheng nodded, then looked at her.

"You said that only a small number of humans survived after the Ice Age, and because they ate the remains of the descendants of the Twelve Ancestral Witches, the descendants produced Aliens. Could it be that there were other animals at that time, such as one or two fish, or they also ate a little bit of the remains of the descendants of the ancestral witches, and then mutated and appeared as a merman? ”

"You have a lot of point, and your guess is correct. Qiu Changsheng said.

"Huh?"

Qiu Changsheng explained: "You said that there were other animals that survived and ate the flesh and blood of the descendants of the ancestral witch, and the offspring mutated, which is indeed true. ”

"Then why didn't you tell me at the time?" asked Liu Xi.

"Because those mutated animals have been killed by the superpowers, I'm afraid that I may not be able to find one or two when I search the earth now, so why bother to tell you these useless words. ”

Liu Xi understood.

Each other is the blood and genes of the Wu clan, as long as they slaughter and devour each other, they can obtain each other's power, which is driven by the instinct of all Wu descendants.

The Devourer is repelled by all the Adepts because of their slaughter. But what if it is not your compatriots who are slaughtered, but other creatures?

I believe that all the supernatural beings will not be soft-hearted, but will regard these creatures as natural treasures to nourish their own bodies, just like humans like tonic such as Cordyceps sinensis and old ginseng.

In such a situation, how can other creatures with ancestral blood survive?

Isn't that a living example right in front of you?

With so much merman oil, how many mermaids died, and how much merman oil was refined?

Who is the owner of this tomb, so that in the stone corridor that enters the tomb, countless mermaid oil lanterns are lit!

Liu Xi and Qiu Changsheng glanced at each other, and at the same time turned their heads to look at the bottomless stone corridor.