The muscle increasing type I can additionally enhance the strength of 100 kg, but now it has been upgraded to muscle increasing type II, and the strength that can be enhanced has changed to 300 kg, which means that in the state of muscle increasing type II, with the basic strength of 700 kg, the strength that can burst out has reached 1000 kg.

It was unimaginable for Su Li before.

The iron stick in his hand is not light. For Su Li now, it's as easy as carrying a dead grass, but the power of hitting it has increased greatly. With one stick, the rat's head hit by him is no longer collapsed and broken, but the whole burst.

Su Li was successfully promoted to level 3 Lingyuan. With the help of Ding Longyun, Xu Xuehui on the other side also successfully killed two low-level corpses and became Level 2 Lingyuan.

As a level 2 spiritual source, Xu Xuehui's body has been strengthened. The most intuitive change is that her basic strength has been directly improved. The worse her original physical quality, the weaker her strength, and the more obvious the effect of this evolution, because Xu Xuehui is just a little girl. Her original physical quality is much worse than Su Li and Ding Longyun, However, the evolution after obtaining the spiritual source is also greater. Once promoted to level 2 spiritual source, she now has a power of 600 kg.

"What are the two choices to strengthen?" Ding Longyun asked, afraid that Xu Xuehui would choose indiscriminately.

"Ears, lungs." Xu Xuehui's answer was very simple and her voice was very low.

"Choose lungs." Ding Longyun did not hesitate to let Xu Xuehui make a choice: "there is all water outside. There must be nothing wrong with enhancing lung capacity. I have strong lung type III now."

Su Li looked at Ding Longyun unexpectedly and said, "why don't you strengthen your muscles and strength? Why do you always strengthen your lungs?"

Ding Longyun said with a smile: "Who calls me seasick? Besides, the water level is still rising slowly. It doesn't necessarily mean that all places will be flooded one day, so we can only live in the water. At that time, you will know the benefits of strengthening lungs. Do you know how long I can hold my breath? Thirteen minutes, that is to say, I can stay in the water for thirteen minutes after taking a breath. Do you know what this is What is the concept? "

"Whales who have been living in the sea can hold their breath in the water for about 10 to 30 minutes. Now I am more powerful than some whales who hold their breath for a short time."

After hearing what he said, Su Li was also a little envious. He thought that he could catch up with whales when he held his breath now. Maybe he could live in water in the future.

However, if Su Li chooses again, he will still choose to strengthen his muscles.

Now he has also found out a little law. For each level, the basic strength can be increased by about 100 kg. According to this law, Ding Longyun, who is now level 4, has a basic strength of about 800 kg. Purely speaking of strength, Ding Longyun is not as good as himself.

While the two were discussing, Su Li kept on with his hands. Su Li solved several rat beasts that rushed up. Now the number of spiritual sources he has has has increased to six, and it still needs 24 spiritual sources to improve again.

Perhaps Su Li's performance was too terrible. The stairs were full of rat carcasses. Other rat animals still alive in the rear scattered in a crowd and rushed downstairs. They disappeared into the darkness and didn't continue to rush up.

Su Li did not catch up, but looked upstairs. He vaguely heard something coming down from the roof and said, "brother Ding, do you want to go back and try that bully crab?"

He now has a powerful force, and his speed and reaction have been further improved. Ding Longyun has been promoted to level 4. They work together to deal with a level 3 Elite crab, which is still very promising.

Su Li is interested in the special ability obtained by killing Ba crab observed in the "peeping Rune pattern": Ba Jia.

It can be said that Su Li's special ability is amazing for the improvement of combat effectiveness. Su Li can crush monsters at the same level and even kill higher-level Lingyuan beasts. On the one hand, it is because he chose to strengthen his muscles and obtain strong strength. On the other hand, it is because of his special ability "teeth of gluttony" and "peeping Rune".

The "tooth of gluttony" is extremely sharp and unstoppable. The "peeping Rune" can let him know himself and the enemy, and understand the strength and weakness of his opponent. For example, he jumped over the level to fight against the sea iguana dragon before. He just passed the "peeping Rune" It is known that this kind of giant lizard is highly toxic, so try to avoid being bitten by it when fighting. If you don't know before and don't have this sense of preparedness, as long as you are bitten by the teeth of the sea iguana giant lizard, the result will be completely different.

"OK." Ding Longyun was also eager to try. He waved the steel shovel in his hand towards the corridor, beat the two low-level corpses flying in front of him, and then turned and ran towards the stairs on the roof.

Su Li followed closely and said to Xu Xuehui, "you follow me. You can stay at the entrance of the stairs later. Don't come out. This bully crab is more dangerous. Those rat beasts don't dare to come up. These corpse beasts can't hurt you now."

Xu Xuehui nodded. She is now a level 2 spiritual source and has a little experience. It is really easy to deal with this low-level corpse beast. She is no longer as flustered and at a loss as at the beginning.

The three people went up the stairs. Ding Longyun, who was in front of them, said, "this guy is really persistent. He's still blocking here."

At the roof exit, the huge bully crab was still blocked at the exit, and was destroyed by a pair of claws from time to time. The iron door of the exit was deformed by it.

When Ding Longyun rushed up, the weak iron door finally fell off. As soon as he was pushed by the big claw of bully crab, he fell off the door frame and hit Ding Longyun who had just rushed up.

Behind Ding Longyun are Su Li and Xu Xuehui. They can't dodge. They can only grasp the steel shovel with both hands and block the iron door.

Ding Longyun's arms shook with the sound of "Zheng", and the iron door was blocked by him with a steel shovel. His arms were numb and his teeth grinned. Then he gave a "Hey" sound in his mouth, pushed the distorted iron door, used it as a shield to protect his body, and rushed towards the bully crab at the exit.

The iron door was pushed by Ding Longyun and blocked on the bully crab at the entrance. It made a huge noise, but the bully crab had great power. Ding Longyun's collision did not completely knock it open. Su Li followed closely, ran forward and collided with the iron door, and Qianjin Juli burst out suddenly.

"Bang -"

The iron door was forced to fly out by them. With the flying iron door, there were rolling crabs.

The bully crab blocking the entrance and exit was pushed to fly. Su Li and Ding Longyun were relieved, rushed out of the door and returned to the roof again. Xu Xuehui guarded the entrance and exit according to Su Li's instructions. It was relatively safe here. The bully crab could not attack. She only had to deal with the low-level corpse beast up the stairs.