After realizing the information in his mind, Zu Li felt shocked. The super heart actually doubled his physical strength. In his original physical condition, if he exploded with all his strength, he would use the strongest force to fight for two minutes in each attack. Now the super heart can extend this full strength explosion state for three minutes, which means that he will be able to explode for up to five minutes now.

This state will be very terrifying.

In addition, he gained an additional 100 kilograms again, and his strongest strength will reach an astonishing 2,300 kilograms.

In just a few seconds in an instant, a drastic change occurred in his body. Su Li took a deep breath and looked at the withdrawn undead, not in a hurry to attack, but continued to sense the information in his mind.

What he noticed most undoubtedly was the "spiritual source technique" that only those who reach level 5 can open and comprehend.

You can also choose to understand and master the "spiritual source technique".

Perhaps it is related to his connection to strengthening muscles. The "spiritual source technique" he can comprehend is related to muscles, one is "steel muscle" and the other is "devil muscle".

However, there is no detailed information about these two spiritual sources. He does not know the specific effects, so he can only speculate based on his name.

"Steel muscles", as the name suggests, should be able to make the muscles look like steel, and their effects may be similar to Chen Xiangyu's "Steel Skin". Once mastered, they will have amazing defense and even invulnerable swords and guns.

As for "devil muscles", just judging by the name, it is difficult to guess its efficacy. It should be the same level of ability as "steel muscles", but the specific ability of Zuli guesses that it may be related to strength.

For a moment, Su Li could not make any choice, and the undead roared again and rushed towards Su Li again.

Su Li was slightly angry, his eyes glowed, staring at the undead that was rushing towards him, and activated the "spider walking". As he upgraded, his comprehensive abilities in all aspects improved. Zu Li's speed in the "spider walking" state increased again. His figure swung, penetrated through two advanced corpse beasts, and in an instant he walked around behind the undead, clenched his left hand into a fist, and punched him out with a sudden punch.

With a "bang", the boxing force that exceeded two thousand kilograms of boxing beat the undead and fell heavily to the ground with a heavy blow.

Su Li followed closely, facing two high-level corpse beasts to stop him. Su Li swept out with a knife in his right hand. The speed and strength were perfectly combined. The two high-level corpse beasts had no time to react and their heads flew out.

Two spiritual sources entered Zuli's body, and unexpectedly, no information appeared in his mind.

"The spiritual source of this advanced corpse beast has been invalid for me?" Su Li frowned slightly. He was promoted to a level 5 spiritual source. If he wants to upgrade again, he needs a total of 70 spiritual sources. Even if he kills this advanced corpse beast, he can no longer obtain an effective spiritual source. It seems that he needs to kill stronger monsters.

When Su Li killed these two high-level corpse beasts, the undead that fell out crawled up again. Although there were four holes on his head and a fist pit was smashed by Su Li on his back, it did not die. It just kept retreating and wanted to widen the distance between him and Zu Li. It obviously realized that Su Li in front of him became stronger, completely different from what he had just done.

"Do you want to escape?" Su Li smiled with teeth, suddenly his body lowered slightly, and leg phantoms appeared around his body again, entering a "spider walking" state. The undead consciousness in the retreat was not good, and suddenly roared. The high-level corpse beasts who heard its roar seemed to have received some special order and stopped attacking Su Li, Ding Longyun, Gong Xiao and others, but instead grabbed the corpses of the arrow snake beasts, the water monkey beasts and the corpse beasts left on the ground and threw them out of the edge of the building.

This sudden scene surprised everyone. Su Li had already rushed out like lightning and arrived within three meters of the retreating undead. The undead knew that he could not escape. His claws suddenly grabbed it wildly and ejected his head, trying to counterattack Su Li and fight for a chance to escape.

Zuli's feet were intertwined and his body moved like a ghost, avoiding its attack, holding the machete in his hand tightly and slashed in the air.

The knife slashed the undead's neck, which was stretched like a spring, and cut off the long neck with a "swish" sound.

Bright red blood spurted out, and the undead's head with four blood holes flew out from afar.

On the roof of the building, high-level corpse beasts were everywhere. These corpse beasts seemed to be in a state of madness, constantly carrying corpse beasts to throw them out of the building. Ding Longyun and his men couldn't even chase and block them.

In just a short time, at least a dozen or twenty corpse beasts were thrown away.

Su Li successfully killed the undead, and a spiritual source penetrated into his body, and finally a message appeared in his mind.

"Level 5 Spiritual Source: Spiritual Source 2/70"

Killing the dead spirits, harvesting two spiritual sources at once, which is comparable to killing elite beasts of the same level.

At this moment, Ding Longyun, Gong Xiao and Xu Haishui were chasing these high-level corpse beasts who were crazy about throwing their bodies downstairs.

During the period when Zuli fought with the undead until he killed him, the three of them killed many corpse beasts, and each of them harvested more than ten spiritual sources.

In just a short time, more than twenty corpse beasts were thrown away. This was the last order given to these corpse beasts before the death of the undead. Zuli entered a walking state again, and the machete in his hand slashed out one after another.

Although he can no longer harvest effective spiritual sources by killing these corpse beasts, he must stop them.

"This guy ordered the corpse beasts to throw so many corpse beasts away. Is he trying to lead out a more terrifying monster? Even if he dies, he wants to drag us to die together?"

Zu Li thought that the only reason why the undead issued this order was this possibility. From this point of view, the wisdom of the undead was no less.

The heads of high-level corpse beasts were cut off by Su Li. In the blink of an eye, more than ten corpse beasts were harvested by him, and he was still pondering the choice of the spiritual source technique in his mind.

Which one should you choose from "steel muscle" or "devil muscle".

Xu Haishui said before that from breaking through level 4 to level 5 spiritual source will have a qualitative leap. The most important reason is this "spiritual source art". The "spiritual source art" is far stronger than special abilities and even determines the future. Therefore, choosing the most suitable spiritual source art is undoubtedly very important, and he has to be cautious.

"The steel muscles are a complete defense ability that can greatly enhance my survivability. Like that Chen Xiangyu, this ability looks very strong, but if you really encounter an extremely powerful opponent, the opponent can completely damage me with powerful force... Just like I was dealing with that Chen Xiangyu at that time..."

Zuli was pondering.
Chapter completed!