Vertically downward, a kilometer in an instant, this is still Ning Tao deliberately controlled the speed, otherwise he can move to a distance of seven or eight kilometers in an instant. In the state of the infant, caused by the eye of the sky, the darkness does not exist. The darkness that could not be illuminated by the refined tactical flashlight vanished at this moment, and he saw a black fog shrouded in the ground, and something faintly appeared, some like mountains, some like rivers, but it was too vague to determine.

The distance of seven or eight thousand meters passed in a blink of an eye, and Yuan Ying began to be unstable, and his sense of the body became blurred. Ning Tao stopped and stopped falling. At this position, his Yuan Ying was already in a black mist. However, when he came to this position, he finally saw the bottom of the abyss, and the distance he measured visually, there were about three or four thousand meters before he could reach the bottom.

The bottom of the abyss is in the shape of a trumpet, which narrows as it goes up, and the cliff behind it gradually slopes towards the edge, forming the shape of an inverted funnel. It was about the size of a small town, with a stone mountain in the middle, and a burning river around it, and black crude oil could be faintly seen surging and bubbling in flames.

The faint light of the fire seen on the cliff was clearly the source of the burning river of crude oil.

Condescendingly, the entire bottom of the abyss was in full view, but Ning Tao didn't see any army of undead, fierce monsters or anything. Except for the stone hill in the middle, the rest of the place is relatively flat, and there are occasional stone piles piled up with rocks, but there is nothing special about it.

Ning Tao's heart was strange: "Did Xerxes and Abshan encounter an illusion that does not exist? But I also clearly saw that terrible shadow......

If he had been sitting facing the abyss, he would not have had this confusion and troubles now.

After observing for a few more minutes, nothing unusual happened, and Ning Tao's Yuan Ying returned to his body.

"It's strange, thousands of troops are charging, roaring and shouting to kill, such a loud noise, the whole cliff is shaking, I feel it, how can it be an illusion? But if it's not an illusion, then there really is some monster down there, is it...... It died of old age under this abyss?" Suddenly thinking of this possibility, the tension in Ning Tao's heart suddenly relaxed.

For more than 2,000 years, I don't know how many creatures have died in this world, and it is normal for a monster to die during this period.

It didn't seem to be dangerous, but Ning Tao still didn't make a decision to open the door and bring his three wives and a group of subordinates in. That black mist is poisonous, and that's a reason. Another reason is that the observation and judgment before setting foot at the bottom of the abyss may change when you set foot on that land.

Ning Tao put away the Tianci Tiansheng bed, and then took out the medicine collection rope from the small medicine box. With a trace of spiritual power injected, the medicine rope flew out of his hand and plunged headlong into the rocky ground on the cliff. He grabbed the other end of the rope, sprinted in two steps, jumped into a leap, and jumped off the cliff with a whoosh.

This seems to be a reckless and very dangerous act, but everything is under Ning Tao's control. The medicine collection rope is the magic weapon of the Heavenly Dao Medical Hall, and since it is a magic weapon, it naturally has mana. The speed at which it extends down is actually not very fast, and in the activated state, it is equivalent to a part of Ning Tao's arm, let it stop and it will stop, let it retract and it will retract.

A few minutes later, with a height of more than 10,000 meters, he was left behind, and Ning Tao's feet finally landed on the ground.

Click!

There was a crisp sound under his feet, and Ning Tao hurriedly removed his feet, only to find that what he stepped on was not actually the ground, but a skeleton covered by dust. He stepped down and broke someone's waist.

The dust swept up, revealing a rusty Persian scimitar.

Looking at this weathered Persian scimitar, Ning Tao secretly said in his heart: "This is the bend of Xerxes's undead army guards, he fell to his death here, more than 2,000 years have passed, his bones are still there, and there are no monsters to eat his corpse, which also shows that there are no monsters here, so what is that huge shadow I saw?"

Without seeing it with your own eyes, even a brain-racking conjecture seems meaningless.

After thinking about it and getting no results, Ning Tao withdrew the medicine collection rope, held the refining barge gun in one hand and a prescription slip with a blood lock in the other, and cautiously walked towards the stone mountain in the middle. Along the way, he found some more bones, and judging by the relics of the bones, they were all Xerxes' undead guards.

It is not difficult to draw a conclusion from the identity of these skeletons, that is, in addition to Xerxes and Abshan back then, there are also the undead guards who died here and the girl in black, who was the first person to set foot here in more than 2,000 years.

Passing by a pile of rubble, Ning Tao stopped. The stones were of various sizes, and they looked like ordinary stones, with no inscriptions, no special patterns, and nothing special.

There are many more stone mounds like this, all over the bottom of the abyss.

Ning Tao lost interest in continuing his research after looking at it, he left the stone stone and strode towards the stone mountain.

The fire of the earth and river that surrounds the stone mountain burns, but no smoke rises. The black crude oil rolled and surged in the underground river, and the fire did not strengthen or weaken, and always maintained a height of several tens of meters. From above, it is difficult to see clearly through the black mist, and when it comes closer, it is not clear because of the wall of fire. However, in terms of the shape and scale of the stone mountain, it looks like the mound of sealed soil of the Qin Emperor's Mausoleum where he and Lin Qingyu completed an important transaction.

As Ning Tao got closer and closer, a scorching wave of air rushed to his face, and the hairs on the back of his hands and face turned to ash and fell off his skin.

Ning Tao then pulled down the hood to cover his face, and used the "elastic rope" woven by Tianbao silk in the hood to close the hood, completely protecting his face, leaving only an opening where he could see. This design had been in place for a long time, but he had never used it even in a shootout, but he had to use it if he wanted to cross the wall of fire. After that, he retracted his hands into the sleeves of the Heavenly Treasure Magic Robe and hid them, so that although the heat wave released by the wall of fire was terrifying, it could not hurt even a single hair of his hair.

After some distance, Ning Tao came to the side of the Earth River. His gaze fell on the earth river in front of him, this earth river is not wide, only a dozen meters wide, and there is a ladder under his feet and the void can be easily crossed by two steps. But just as he was about to do so, his attention shifted to the crude oil in the river.

That's no ordinary crude oil.

Ordinary crude oil is viscous, there are many impurities, and the smoke is billowing when burning, but it is not only not viscous, but gives people a clear texture, it burns so violently, and the flame dozens of meters high does not have a wisp of smoke. What's more, it releases a rich aura, and that aura is a typical aura that only has a treasure of heaven and earth.

This is not crude oil, it is earth fire oil.

The Middle East is rich in oil, as long as there is spiritual land, there is crude oil, and some specific conditions can be met to give birth to the spiritual material of earth fire oil. There is so much earth fire oil here, which means that there is a lot of spiritual soil here!

Ning Tao was excited, even if there were no divine tombs here, and there were no immortal torches, as long as he found the spiritual soil here and took away some earth fire oil, his adventure this time could be regarded as a bumper harvest!

He squatted down beside the river and picked up a handful of dirt with his sleeve-wrapped hand. The soil on the surface was cut off, and a ball of cyan spiritual soil was suddenly exposed. He then changed his position and picked a handful, picking out the dirt on his face, and another piece of cyan spiritual soil was exposed.

"Hahaha!" Ning Tao couldn't help but laugh out loud, the spiritual soil reserves here were amazing, even if he turned all the five warehouses in the Heavenly Dao Medical Pavilion into spiritual fields, it would not be a problem!

The wall of fire shook inexplicably, and it felt like it was blown by a strong wind, but this is a closed underground space, where does the wind come from?

It was this shaking that Ning Tao finally saw the scene behind the wall of fire, that is, he was stunned when he saw him at this glance.

It wasn't a stone mountain at all, it was a stone temple.

The incomparably special and magical stone temple, it is not built with pieces of stone, but a majestic temple carved out on a stone hill! The gate dozens of meters high is like an archway, and the stone pillars supporting the temple need several people to hug to surround it, and the steps paved in front of the gate are all carved out of this whole stone, and there is no trace of splicing!

If this temple were moved to the ground, it would definitely be a sensational wonder in the world, and the eight wonders of the present world would be eclipsed in front of it!

Suddenly, the wall of fire shook obviously, and the flames dozens of meters high blocked Ning Tao's vision again. There were obvious signs of being blown by the wind, but he didn't feel the slightest breath of the wind.

"Could it be...... Yuan Ying?" Ning Tao's mind suddenly froze, he himself had many experiences of Yuan Ying out of his body, although Yuan Ying couldn't see or touch, but there were still traces of the rapid movement of energy, that is, Yin Feng.

However, after the wall of fire shook twice, nothing strange happened. There was no Yuan Ying trying to encroach on his body, nor was he attached to any small animals, not to mention that there were no small animals here. Every inch of the air here contains poison, and if it weren't for the fact that his blood and spiritual power have their own detoxification function, and the Heavenly Treasure Magic Cloak protects his body so that all poisons are not invaded, he would not be able to move here.

However, it was this suspected sign of Yuan Ying's movement that aroused Ning Tao's vigilance, and he gave up the idea of jumping directly over the Black Fire Oil River. He looked around, picked up a stone beside him, and threw it into the wall of fire.

The stone entered the wall of fire, and suddenly fell, straight into the river of black fire oil, and in the process, in a few seconds, it was burned into powder by the flames, and then rose with the flames, and fell in a flutter.

This dust all over the ground must have come from this way. Black fire oil is so pure that it is possible to tolerate impurities?

A sneer appeared at the corner of Ning Tao's mouth: "Sure enough, there is a magic circle to protect me, but you can't help me." ”

He reached out and opened the small medicine box, took out the Tianci Tiansheng bed, and threw it into the earth.

The void trembled, and the Tianci Born Bed opened with a bang, and fell into the black fire oil river, and the four feet of the bed were submerged in the black fire oil, but the bed board was attached to the river and became a ready-made boat. As soon as it entered the river, the flames around it immediately dissipated, and a gap appeared in the wall of fire.

Ning Tao jumped up, jumped onto the Tianci Born Bed, and shouted: "Go!"

The heaven-sent bed shook the waves and sailed to the other side.

In ancient times, Bodhidharma crossed the river with a reed, and now there is Dr. Ning crossing the river with a bed.