With the fall of Castlevania to the Terran army, the Demon Empire collapsed in an instant, except for a small number of Demon powerhouses who escaped by luck, most of the Demon powerhouses died tragically in the battle, and the territory controlled by the Demon Empire immediately became the land of the Terrans.

After the Castlevania City was captured by the Terran army, Yang Feng selected a large number of the most precious treasures from the belongings that Jiang Fangzheng and Wang Meng had robbed, put them in the space ring, and gave a few words to Wang Meng and Jiang Fangzheng, and then left the Castlevania City and galloped in the direction of the Demon Abyss, the forbidden land of the Demon Empire.

The Demon Abyss is the place where the spatial rift between the spatial mezzanine and the Demon Realm is located, and countless rich and pure demonic qi gushes out from the spatial crack, filling the Demon Abyss, and spreading outward with the Demon Abyss as the center.

The Demon Abyss covers an area of very vast, with millions of square kilometers, mountain peaks, dense forests, rich demonic energy, countless demonic beasts infected by demonic energy, its peaks and forests are rampant, and the combat power is extremely powerful, but also extremely ferocious, far from the outside world can be compared with the demonic beasts.

Corresponding to the danger of the Demon Abyss, the Demon Abyss contains a huge amount of wealth, because of the strong demonic energy, under the nourishment of countless years, countless demonic stone veins are condensed in the mountain peaks, and these demonic stone veins are the main reason for Yang Feng to enter the Demon Abyss.

And the spirit stone contains pure aura, the pure demonic energy contained in the magic stone, the pure demonic energy in the magic stone, in addition to the demon can be absorbed for cultivation, Yang Feng can also absorb it and transform it into pure true qi.

After mining and absorbing the demon spirit stones in the demon spirit stone vein, Yang Feng set his eyes on the magic stones and spirit stones, and after weighing them for a while, he decided to use the magic stones first before ordering Wang Meng to recruit Terran warriors and attack the demon empire.

Because Castlevania City was close to the Demon Domain, and the Demon Abyss was in the depths of the Demon Domain, coupled with Yang Feng's extremely fast flight speed, in the evening, Yang Feng passed through the edge of the Demon Territory and entered the Demon Abyss area deep in the Demon Territory.

As soon as he entered the Demon Abyss, Yang Feng felt that it was extremely rich, far exceeding the demonic qi of the outside world, and cultivating the Demon Skill in the Demon Abyss, the cultivation speed was definitely dozens of times that of the outside world.

It's just that the demonic energy in the demon abyss is even more violent than the outside world, and if you are not careful, you may be blown up by the violent demonic qi and turn into pieces of flesh and blood in the sky.

"It's worthy of the Demon Abyss, the demonic qi here is really much thicker than the outside world, I don't know how thick the demonic qi should be in the center of the Demon Abyss, where the spatial crack is located!"

After feeling the rich demonic qi of the Demon Abyss, a faint smile appeared on the corner of Yang Feng's mouth, and with a soft mutter, he encouraged the true qi in his body, turned into a white afterimage, and galloped straight towards the depths of the Demon Abyss.

Oh! Oh! Oh!

When Yang Feng went deep into the Demon Abyss for dozens of miles, a demon wolf that was more than a foot tall, covered with black hair, sharp claws, and eyes flashing with a ferocious light, appeared in Yang Feng's field of vision, and found Yang Feng's traces for the first time, and let out an angry wolf howl, as if he was scolding Yang Feng for intruding into their territory at will.

In the angry wolf howl, the demonic qi on the bodies of the demon wolves surged, soared into the air, turned into black afterimages, and rushed straight towards Yang Feng's body, the sharp claws flashing with a faint ghost light in the darkness,

When he pounced on Yang Feng, the mouths of the demon wolves opened slightly, and one after another black wind blades condensed by demonic qi were formed out of thin air, with sharp edges, and slashed straight towards Yang Feng's body, looking like they wanted to cut Yang Feng into pieces of flesh and blood.

In the face of the attack of the demon wolf, Yang Feng's expression remained unchanged, the true qi in his body surged, and the extremely powerful sword rays were condensed out of thin air, with sharp edges, lightning slashed through the void, and slashed towards the bodies of the demon wolves.

Bang! Bang! Bang!

With the crisp sound of metal colliding, the fierce sword rays destroyed the black wind blades one after another, and stood on the bodies of the demon wolves one by one, mercilessly slashing the demon wolves, making them into broken corpses.

"Go!"

Looking at the dozens of demon wolves on the ground, Yang Feng pondered for a while, and with a wave of his hand, the iron beetles in the spirit beast bag flew out, turned into a black cloud, and pounced on the corpses of dozens of demon wolves on the ground.

In the blink of an eye, the corpses of dozens of demon wolves were devoured by iron beetles, leaving not even a single flesh and bones, as if they had never appeared.

After devouring the corpses of dozens of demon wolves, the iron beetles quickly converged together, turned into a black cloud, suspended above Yang Feng's head, and galloped towards the depths of the demon abyss with Yang Feng.

After Yang Feng's cultivation, especially after devouring the corpses of a large number of Demon Innate Martial Artists and Mana Realm Martial Artists, as well as a large amount of refined iron, the speed of evolution is very fast, and the speed of reproduction is also very fast, and it has expanded from more than a thousand to more than ten thousand.

The earliest more than 1,000 iron beetles have all evolved to the limit of iron beetles, with the strength and combat power of the half-step mana realm, and the defense is even more powerful, which can resist the attacks of the early stage of the mana realm, and the comprehensive combat power can be comparable to the martial artists who have just entered the mana realm.

The remaining more than 10,000 iron beetles are also evolving very fast under Yang Feng's investment regardless of the cost, and they already have the strength and combat power of innate martial artists, coupled with their strong defensive power, their comprehensive combat power can be comparable to that of mid-to-late congenital martial artists, so that Yang Feng can carry tens of thousands of mid-to-late congenital martial artists with him to help him sweep away some guys who are in the way.

It's just that although the evolution speed of the iron beetle is very fast, Yang Feng is not particularly satisfied, because the strength of the iron beetle is still too weak compared to himself and cannot give it much help.

If the iron beetle can evolve to the limit of the copper beetle and have the strength and combat power of the peak of Jindan or even the half-step god core realm, it will be of great help to Yang Feng.

It's just that the evolution of the iron beetle to the copper beetle is a leap to the life level, and it needs to devour a large amount of iron essence and a large amount of flesh and blood souls.

At this time, after devouring a large number of demon powerhouses, the iron beetle is no longer short of flesh and blood souls, only a large amount of iron essence is lacking, as long as there is a large amount of iron essence for the iron beetle to devour, the earliest more than a thousand iron beetles can evolve into copper beetles, with the strength of a mana realm martial artist, and have the potential to evolve to the peak of the Jindan martial artist.

Airplanes! Airplanes! Airplanes!

When Yang Feng went deep into the Demon Abyss, a black cloud made a buzzing sound, galloping from afar, and quickly reflected Yang Feng's field of vision.

"Demon mosquitoes!"

Looking at the black clouds that were approaching rapidly, Yang Feng couldn't help but exclaim.

Demon mosquitoes live in the demon abyss, live by sucking the blood of demonic beasts, and have the strength and combat effectiveness of the innate realm, every time they go out, thousands of demon mosquitoes act together, and a single blow can cover the body of a demonic beast in the mana realm, and instantly absorb the blood of the demonic beast in the mana realm, making it a skeleton covered with fur, which is very terrifying.

Airplanes! Airplanes! Airplanes!

When Yang Feng exclaimed, the black cloud composed of tens of thousands of demon mosquitoes suddenly accelerated, turned into a black lightning, and pounced on Yang Feng's body, looking like he wanted to suck up Yang Feng's blood.

"Go!"

Looking at the black clouds that rushed over, Yang Feng snorted lightly, suspended above his head, and the black cloud condensed by tens of thousands of iron beetles instantly turned into a black lightning bolt, taking the initiative to meet the black cloud composed of demon mosquitoes.

In the blink of an eye, the two black clouds collided together, tens of thousands of demon mosquitoes and more than 10,000 iron beetles launched a fierce confrontation, and countless powerful air currents swept out from the place where the demon mosquitoes and iron beetles fought, destroying the surrounding trees dozens of feet high, turning them into sawdust in the sky.

The attack method of the demon mosquito is very simple, there is only one means of sucking blood, and it is very powerful to deal with ordinary flesh and blood, and it can instantly suck up the blood of the prey, but it is not enough to face the iron beetle with strong defense, and even the defense of the iron beetle cannot be broken, let alone the blood of the iron beetle.

Therefore, from the very beginning of the battle, the demon mosquito was at an absolute disadvantage, and countless demon mosquitoes turned into a broken corpse under the attack of the iron beetle, which was devoured by the iron beetle and turned into the food for the evolution of the iron beetle.

In just a quarter of an hour, tens of thousands of demon mosquitoes were attacked by tens of thousands of iron beetles, and their corpses were devoured, leaving only a messy battlefield that recounted the fierce battle before.

"Let's go!"

Seeing that the demon mosquito was eliminated, Yang Feng's expression remained unchanged, and with a light snort, he turned into a white afterimage and galloped straight towards the depths of the demon abyss.

The tens of thousands of iron beetles quickly condensed into a black cloud, suspended above Yang Feng's head, and followed Yang Feng towards the depths of the Demon Abyss.

There are tens of thousands of iron beetles, Yang Feng didn't make a move at all along the way, once he encountered the demonic beast that was blocking the way, let the iron beetle make a move, and kill and devour the demonic beast that was in the way.

Soon, Yang Feng went deep into the Demon Abyss, and a huge iron mine came into Yang Feng's mind, which made Yang Feng's eyes light up, with a look of expectation on his face, and muttered softly: "Such a large iron mine, there should be a lot of iron essence in it!" ”

After muttering for a while, Yang Feng turned around and galloped away in the direction where the iron mine was located.

Soon after, Yang Feng flew to the location of the huge iron mine, and the black cloud suspended above his head turned into a black lightning, and pounced straight towards the huge iron mine, and his sharp teeth quickly devoured the pieces of iron ore, and instantly opened a deep hole in the huge iron mine, and continued to devour the depths of the iron mine.

Seeing this scene, the look of anticipation on Yang Feng's face became even stronger, and he sat cross-legged by the pit, waiting for the news of the iron beetle.

A few hours later, tens of thousands of iron beetles flew out of the pit, and the earliest more than 1,000 iron beetles had a little more bronze on their bodies, and as soon as they appeared in front of Yang Feng, they turned into afterimages, rushed into the spirit beast bag, and fell into a deep sleep.

"There should be iron essence in the depths of the iron mine, otherwise it is impossible for these more than a thousand iron beetles to fall into evolution! When these more than 1,000 iron beetles have evolved and become copper beetles, I am investing a lot of copper ore and other resources to let them evolve to the limit of copper beetles, and I can have more than a thousand helpers with the strength and combat power of the peak realm of Jindan! ”

Putting a trace of consciousness into the spirit beast bag and observing the evolution of more than a thousand iron beetles, Yang Feng whispered to himself with a look of anticipation.

After whispering to himself for a while, Yang Feng took more than 10,000 iron beetles with innate martial artist combat power and continued to rush to the depths of the Demon Abyss.

On the next journey, Yang Feng didn't stop anywhere, just left the locations of the various ore veins he encountered along the way, and then organized people to mine them, and then galloped away to the central place of the Demon Abyss.

Three days later, Yang Feng came to the center of the Demon Abyss, and at the edge of a huge spatial rift, countless pure demonic qi continued to overflow from the spatial crack, making the concentration of demonic qi in the surrounding air hundreds of times that of the edge of the Demon Abyss.

"The demonic qi here is very strong, which is very suitable for establishing a demonic gathering array and speeding up my cultivation!"

Glancing at the huge spatial crack, and feeling the extremely rich demonic qi at the edge of the spatial crack, Yang Feng whispered to himself with a smile on his face.

In a low voice, Yang Feng began to take out a large number of precious materials from the space ring, and began to arrange the demon gathering array in an orderly manner, gathering the demonic qi within a radius of hundreds of miles.