Regarding the refining of corpses in the witch cult, Li Yuan also learned something through this time, except for those low-level zombies who have not cultivated, the other four corpses of gold, silver, copper, and iron are all refined or evolved through special means.

Among them, the weakest is the iron corpse, whose body is like iron, invulnerable, and probably has the strength of about six layers of qi refining.

Ranking above the iron corpse is the bronze corpse, in addition to the physical body is harder than the iron corpse, the strength can be compared with the monk at the peak of qi refining.

And the biggest difference between the two is that the strength of the bronze corpse can be improved and advanced.

It stands to reason that the Iron Corpse will never be able to defeat the Bronze Corpse, but the Four Evil Iron Corpses that appeared at this time are an exception.

These four evil iron corpses are a relatively special existence in the refining of corpses, due to the accidental variables in the process of refining corpses, which leads to the mutation of corpse refining, and a kind of iron corpse that can absorb evil qi by itself is born.

To put it simply, it is a mutated iron corpse.

This was originally nothing, after all, even if it was a mutated iron corpse, its strength was still too weak, and it still couldn't compare to the copper corpse.

But there are also capable people in the witch cult, and more than a hundred years ago, a witch cult cultivator who claimed to be a corpse craftsman had studied a set of advanced methods for mutating iron corpses by studying the way of refining corpses.

That is by gathering the four mutated iron corpses, and then combining them with the way of the formation, the evil qi on the four mutated iron corpses complement each other and become one.

Doing so not only gave the four iron corpses the method of combo attacks, greatly increasing their combat power, but also established a cycle, making it possible for them to advance.

This is the Iron Corpse of the Four Evils!

......

"How can you have a bronze corpse!" When he saw the blue-faced fanged and hideous-looking zombie standing next to Li Yuan at this time, the black-robed evil cultivator couldn't help but stare at him, with an unbelievable look.

Li Yuan ignored the other party, directly took out the bronze bell of the corpse control, shook it gently, and pointed at the four iron corpses: "Kill them." ”

After speaking, Li Yuan sacrificed the bloodthirsty sword again and hovered in the air to deter the black-robed evil cultivator and prevent the other party from taking the opportunity to escape.

In fact, the black-robed evil cultivator was really depressed at this time.

He was originally a close confidant of an elder of the Witch Sect, and this time he was not sent to intercept Li Yuan, but on the way, he met the bearded evil cultivator who was killed by Li Yuan before, and was called by the other party to help, but he didn't expect Li Yuan to be so outrageously strong.

In addition, he had just gathered the four evil iron corpses for a short time, and this time he came out to collect evil qi, so before he grew up, he could barely fight with a monk at the peak of qi refining, but in front of Li Yuan, I am afraid it was still not enough.

"Damn, if I can collect enough evil qi on the battlefield, I will definitely be able to advance the four evil iron corpses when I go back, and at that time, even if I meet a monk in the early stage of foundation building, I will be able to have the strength to fight. "The black-robed evil cultivator felt a remorse in his heart, why did he just listen to the words of the bearded man to contain some treasure thieves.

Now it's okay, I'm afraid that the matter of the advancement of the four evil iron corpses is no fun, and I am afraid that my own life will have to be pasted in.

Just when the black-robed evil cultivator was remorseful in his heart, the bronze corpse and the four evil iron corpses had already handed over.

"Roar~~!"

I heard the bronze corpse roar, and its legs bounced high, and it landed directly on the place where one of the iron corpses was standing like a cannonball, smashing into the dirt and flying wildly.

Immediately afterwards, I saw the other three iron corpses surrounding, and the two sides quickly fought together.

Bang bang bang!

As the battle began, sparks splashed on the field, and the sound of gold and iron clashing was constantly heard, and those iron corpses were also constantly knocked away under the huge force of the bronze corpses, but they soon got up unharmed and joined the battle again.

At first, the bronze corpse was able to rely on its superior physical strength to shake the four iron corpses without falling behind.

Seeing that the four evil iron corpses were about to be defeated, the black-robed evil cultivator finally couldn't help but make a move.

I saw that as soon as he bit the tip of his tongue, a mouthful of black blood spit out in the palm of his hand, and then pinched the trick, and with a flick of his fingers, the black blood was shot at the eyebrows of the four iron corpses.

"Roar!"

A deafening roar was remembered, and the evil qi on the four iron corpses suddenly rose, extending out like tentacles, touching each other, and connecting into one breath.

The evil qi gathered together, forming an even more powerful evil qi, and transported it into one of the iron corpses, pushing its cultivation directly to the peak of qi refining.

And that's not all!

Just when Li Yuan was surprised, the evil qi turned around again, and it spread to the second iron corpse, raising it to the peak of qi refining.

After that came the third, the fourth.

In just an instant, the four iron corpses were all promoted to the peak of qi refining under the connection!

"The first time I saw it, is this the combined power of the four iron corpses?" Li Yuan narrowed his eyes and looked at the battle situation with interest.

However, as he observed, he gradually discovered some doorways, and it turned out that this connection was not as miraculous as the rumors said, but it was just a collection of powers.

On the surface, the four iron corpses have all been promoted to the peak of qi refining, but in fact, it should be said that only one has risen to the peak, and the other iron corpses are just sharing its cultivation.

This will have a big drawback, that is, as long as you kill one of the iron corpses, then the other three iron corpses will also die!

This is the biggest weakness of the method of linkage.

Of course, this method of carrying is still very remarkable, which can't help but make Li Yuandu begin to admire the corpse craftsman who invented this method.

"The method of connecting 携️ these four evil iron corpses is a bit interesting, maybe it will be useful to me!" Li Yuan was very interested in this method of connection, thinking that he would find a way to get these four evil iron corpses to study it well no matter what.

......

With the activation of the method of comboding, the strength of the four iron corpses has been greatly improved, and they can also use a low-level earth attribute spell called "Earth Thorn Technique".

In this way, the ending can be imagined.

No matter how the bronze corpse resisted, even if it spewed out the corpse poison that could be used as a killer weapon, it was also invincible with two fists and four hands, and it was suppressed to death by the four evil iron corpses, and it didn't take long for it to be dismantled!

But just when the victory and defeat were just scored, and the black-robed evil cultivator breathed a sigh of relief, he was shocked to find that Li Yuan, who was standing not far away, was actually gone!

This discovery immediately startled him, and he felt a chill in his back.

"Friend, I'll lend you four iron corpses. ”

As soon as the words fell, the black-robed evil cultivator noticed a slightly warm hand on his shoulder, and then heard a tepid young man's voice behind him, "In return, I will send you on your way with the highest standard funeral." ”

Bang!

A muffled thunder exploded, and the black-robed evil cultivator was annihilated in a burst of thunder.

And the four iron corpses also stood on the spot after the death of the master, became ownerless, and were pocketed by Li Yuan.