Lin Fei estimated that the four demon lords had also entered here before, so they had that kind of terrifying combat power. Obviously, this is an excellent opportunity, but Lin Fei also knows that this kind of entry into the Hell Spar will definitely not be without a time limit, and he must hurry up.

Thinking of this, Lin Fei sped up and swept in one direction.

On the other side, Alice uses a special skill to temporarily take control of a Demonic Monster, and uses this Demonic Monster to kill another Demonic Monster.

After fusing the dropped mid-level magic pattern, Alice looked at the demon pattern monster that she controlled, which was already seriously injured, then thought about it, took out the long whip, and whipped it directly.

This whip is very tough and contains great strength, making it an exclusive weapon for the succubus clan. With a whip, the demonic monster directly burst out of his brain, and died tragically on the spot. Similarly, it also contributed an intermediate magic pattern to Alice.

"The strength has increased so fast, now the master should also be somewhere in this hell crystal, okay, I will work hard to improve my strength, and when he sees me again, he will definitely be surprised!" Alice smiled, but continued to walk forward.

After a few hours of wandering around the Hell Crystal, Lin Fei found that this place was a huge labyrinth at all, and he didn't meet Alice and the four demon lords along the way. Not only that, but Lin Fei also discovered that the entire Hell Crystal was not unchanging.

In other words, the layout here will slowly change over time, so even Lin Fei will not know anything about the southeast and northwest after a while. In addition, Lin Fei also discovered that the Ancient Demon Pattern Monster was a monster that could travel through the hedrons. For them, hedrons are like water, they can travel freely, which is why they are so elusive.

Along the way, Lin Fei killed three more demonic monsters. Got three intermediate magic patterns, but didn't encounter high-level magic patterns and legendary magic patterns. However, according to Lin Fei's inference, this place must also be sub-regional, and the deeper you go, the stronger you can encounter the Demon Pattern Monster. Naturally, that means a higher level of magic patterns.

While dealing with these demonic monsters, Lin Fei also unexpectedly discovered a detail that perhaps only he noticed.

These monsters have no eyes, which means that they have no eyesight, and they don't have any hearing or smell organs, so what do they rely on to swim in this hell crystal?

And once. When Lin Fei was resting, a demonic monster took the initiative to come to the door, which surprised Lin Fei.

Since Lin Fei was obsessed with this matter, he would definitely figure out what was going on, and quickly. Lin Fei finally made a huge discovery under the continuous experiment.

The Monsters here are particularly sensitive to 'vibrations', just like fishing, and the vibrations are the bait that attracts them.

So, Lin Fei found a fairly wide place and summoned Princess Maladon and asked her to keep hitting the hellstone with a hammer.

For demons. The Hell Hedron is sacred, and even the four Great Demon Lords dare not deliberately attack and destroy the Hell Hell Crystal. But Lin Fei has no taboos. Besides, the Hell Hedron is so strong that even Princess Maladon can't break it.

The sledgehammer smashed on the wall of the spar, transmitting vibrations, at first Lin Fei let Princess Maladon knock for more than half an hour, but he didn't find anything, just when Lin Fei was about to give up. But he saw a small black dot in the wall of the spar in the distance.

This discovery made Lin Fei very excited. As a result, Princess Maradon beat harder, and as the black dot approached, Lin Fei also smiled.

It was indeed a demonic monster attracted by the vibration, and while fishing might not always be successful, it was clearly a good way to do it.

And Lin Fei's luck was obviously good, and soon, another black spot was slowly approaching.

"Good!"

Lin Fei looked at the two black dots, one near and one far away, and his heart was excited, and he asked Princess Maladon to continue to knock on the crystal rock wall, while he himself put on a posture of preparing for battle.

Soon, the first black dot was getting closer and closer, and Lin Fei could already clearly see the appearance of the other party, and it was indeed a demonic monster. When the other party swam out of the spar wall, half of his body was outside, and half of his body was inside, Lin Fei stepped forward and stabbed him directly with a sword.

And at this moment, this demon monster obviously didn't have time to react.

Since he was going to fight, Lin Fei didn't intend to give the other party a fair chance, in this case, only a fool would wait for this demonic monster to come out completely.

With a snort, Lin Fei's thunder sword directly opened a hole in the head of this demonic monster, but the opponent's skin and flesh were hard, and it was difficult for an attack to be effective. Fortunately, Lin Fei had long known that the other party was difficult, but he raised his sword and stabbed eight swords in a row, and the swords were all stabbed in the same position.

This time, even the hardest head had to be pierced, and in the last blow, Lin Fei's thunder sword broke out of his skull and picked up a ball of blood.

An extremely powerful demonic monster bred in the Hell Crystal was buried in Lin Fei's hands.

Lin Fei's speed was extremely fast, fusing the intermediate magic patterns dropped by the other party, and his strength was even more advanced, preparing to face the next demon pattern monster that was lured out by Princess Malaton.

For Lin Fei, it may be difficult to deal with the kind of Demonic Pattern Monster that can drop Legendary-level Demonic Patterns now, so this kind of middle-level Demonic Pattern Monster is the most suitable for Lin Fei at the moment.

When he had accumulated enough mid-level magic patterns, Lin Fei's strength would also increase to a new height, and even if he encountered the Great Demon Lord level, it would be enough to deal with it.

Soon, the second Demon Pattern Monster that was attracted by the vibration was killed by Lin Fei who was in full swing, and with the fusion of this Demon Pattern Monster's Demon Pattern, Lin Fei's combat power had exceeded 6,000.

As time passed, Princess Maradon relied on gravity to hit the Hellstone with vibrations, attracting more and more demonic monsters.

This trick is obviously extremely effective, but not everyone can follow it, the entire hell hedron is extremely strong, ordinary demon lords exert all their strength, don't want to make the spar wall tremble a little bigger, if you want to transmit the vibration to a long distance, it is even more impossible, even if it is the great demon lord, if it is not known for its strength, it is impossible to shake it easily.

At most, it is amazing to let this vibration transmit more than ten meters.

But Princess Maraton is a freak.

She is an earth elemental herself, and she is known for her strong and heavy strength, and she used to be able to slap ordinary demon lords to death with one hand, but after getting that earth elemental sledgehammer, this strong power has doubled.

Therefore, she used a sledgehammer to hit the spar rock wall, but it transmitted that vibration to a long distance, according to Lin Fei's estimate, at least 100 meters, so Lin Fei undoubtedly had a unique advantage in attracting demonic monsters. This is like playing a game and opening a cheat, maybe other people are tired of looking for demonic monsters, and there will not be many of them, but Lin Fei can use this method to kill more demonic monsters than others.

The seventh Demon Pattern Monster fell at Lin Fei's feet, and this time Lin Fei saw that what this Demon Pattern Monster had dropped was actually a high-grade Demon Pattern.

During this time, Lin Fei was also constantly moving forward, obviously, he should be constantly approaching the center of the Hell Crystal, otherwise it would be impossible for a high-level demonic pattern monster to appear.

With Lin Fei's current strength, even if it is a high-level demonic pattern monster, it is difficult to shake it. It's just that there is a good saying, 'rare things are precious', the closer you are to the center of the Hell Crystal, the fewer demonic patterns can be drawn, and Lin Fei found that fusing demonic patterns is not an unlimited increase in combat power.

When a certain number of magic patterns are fused, this increase in combat power will gradually decrease, and by now, Lin Fei has been able to fuse an intermediate magic pattern, and the increase in combat power that can be obtained has been reduced to 50 points.

Obviously, the more you fuse, the less you lift.

However, Lin Fei, who was already approaching 7,000 combat power, was still quite satisfied with this, if it wasn't for the good luck of entering this hell crystal, it would be impossible to increase his combat power so quickly outside.

This is the case with the so-called opportunities, and ordinary tasks, even with great rewards, cannot be so.

Continuing forward, Lin Fei found that there were very few demonic monsters, and often did not draw out any demonic monsters for several hours, and he was still like this, not to mention others.

And as he went deeper into the Hell Crystal, Lin Fei found that the color of the originally crystal wall began to deepen, and at this moment, the crystal wall showed a stream of red, as if a lot of blood was flowing in the crystal wall.

Because of this, the field of vision has also been greatly affected.

At this time, Lin Fei passed through a hole and saw a vague black shadow from a distance, and immediately Lin Fei was very excited, thinking that he had encountered another demon pattern monster, but he just walked in and took a look, but found that it was a huge corpse.

This corpse is obviously a demon, with a strong body, sharp claws, and a red body, but at this moment, more than half of this corpse has been submerged in the crystal wall, and it looks very strange and terrifying, as if it is embedded in the wall.

The part that melted into the crystal wall has begun to decompose, and it may be that this demon is the demon lord who entered the hell hedron before, but it is unlucky to die here.

Lin Fei was still observing, but at this time, something terrifying happened.

The stomach of the corpse embedded in the crystal wall suddenly moved, and then a black claw tore through the belly and stretched out.

Lin Fei immediately took a few steps back, staring at the corpse with a serious expression.

Slowly, the owner of the black claws came out of the corpse's belly, and it was a demonic monster, but this demonic monster was all black, but in the black, there were many golden lines that seemed to be skin lines.

When Lin Fei saw this, his pupils shrank.

"Legendary Demon Pattern ......"