The cave mentioned in the mission is next to Jinghu Lake, a reef water cave leading to the bottom of the lake.

The outside of the cave has no special features. After Yu Tu used the investigative skills granted by the mission, he carefully checked the area around the cave to find information about the exploration team.

Soon, he found a dozen messy footprints at the entrance of the cave.

After using the investigative skills again, Yu Tu got a clear message. The exploration team stayed here. However, in addition to the five members of the exploration team, there is also a humanoid biological footprint. After distinguishing it, you can clearly see that the footprint has only four toes, and the sharp fingertips are barefoot. It may be some kind of monster.

Anyway, it is now certain that the exploration team has entered the cave. I just don't know whether the owner of that footprint was first or later.

Yu Tu exhaled and looked at the sapphire at her feet. Qingyu looked at Yu Tu spiritually and nodded gently.

After receiving the affirmation of Qingyu, Yu Tu took out the magic lamp and entered the cave.

The inside of the cave is very humid, but the surface of the stone wall is very clean, not only without any moss, but also a bit cold to the touch, without the expected stagnant water.

After a certain distance, Yu Tu heard the clear sound of water. In the world that the soul perceives, a source of water not far ahead was also found.

Holding the magic lamp, Yu Tu turned a corner and saw where the water was. A funnel-shaped cave. The top is almost one meter above Yu Tu's head. The depth is close to ten meters. The overall area is not small, and there is a lake directly at the bottom. In terms of size, it is comparable to a football field.

Yu Tu keenly noticed some discordant objects near the lake. Slid directly from the **** to the low end and rushed to the side of those items.

Those are some corroded clothes and weapons. Even the hard armor is mostly corroded, and the strong corrosive force has also caused a bad influence on the surrounding environment.

If nothing else, this is the last thing that the exploratory team had before. However, with only these things, the task is not considered complete. It seems that we still need to find the culprit responsible for all this.

Yu Tu carefully avoided the corrosive liquid remaining on the ground and looked at the debris on the ground. Then he cast his eyes to the water. No way, the trace of corrosion that spread from the water to the shore is too obvious.

Just when Yu Tu wanted to step forward to investigate the situation in the water, the sapphire on one side issued a warning cry and entered a state of battle. Then, a huge life form appeared in Yu Tu's perception.

Without the slightest hesitation, Yu Tu opened her wings for the first time, and flew backwards in parallel, widening her distance.

After Yu Tu retreated more than ten meters, the things in the water rushed out of the water. Large swaths of yellow liquid spilled towards the place before Yu Tu. The last traces of the exploration team also disappeared completely under the action of the corrosive liquid poured in a pot.

"Gurulu." The monster let out a cry of dissatisfaction and slowly crawled to the shore.

What does this monster say. The ring-shaped body, the soft abdomen is bright yellow, and the back is dark. There is a ferocious screw mouthpart at the head. It looks like an enlarged leech. However, this is a scary leech that is twenty meters long.

In addition to the usual things, there are a lot of holes at the edge of the leeches where the two colors meet. The corrosive liquid just now came out of those holes.

The exploration technique is activated, and the monster's information is instantly obtained.

Big leech, 75th-level elite boss. The attributes are omitted.

Skills: death weight, acid attack, lethal extraction. Resilient body.

From the attribute point of view, it is a very standard fleshy boss. The dual defense is amazing. Although the health value is a bit exaggerated, it is not a desperate data. The reason why Yu Tu has not yet begun to retreat is because of the low-finger double attack attribute of this monster.

Since the attack is not high, killing this boss is just a matter of time. Yu Tu decisively notified Yu Shuang on the team channel, and he launched a counterattack.

The big leech has only the mouth, and without eyes and other organs, although it has the ability to perceive, it certainly has limitations. At least Yu Tu didn't react in time to the movement of retreating just now. Even before Yu Tu attacked it, it was trying to find Yu Tu.

After Yu Tu launched a counterattack, the big leech immediately found Yu Tu's position and launched a counterattack. The holes in his body were sprayed with corrosive fluid frantically. At the same time, the body is slowly moving towards Yu Tu.

Obviously, its body structure does not support its movement on the ground. However, the corrosive liquid cast by the body acts as a lubricant, allowing it to move forward in a snail-like manner.

Yu Tu easily avoided the leech's attack, constantly judging the threat of the big leech in his heart. Now it seems. There is no need to worry about speed. However, the tough body with the dual defenses of leeches, which has the effect of reducing injuries, is indeed more resistant. Even if the skill is turned on, it will only cause a few hundred damage. If it reaches the real damage, the output will be considerable.

The sapphire on one side lay quietly on the ground, rushing to attack without anxiousness. The leeches were attracted by Yu Tu and came to a position less than three meters in front of the sapphire, and when his back was facing the sapphire, the sapphire attacked.

The structure of the big leech is obviously aimed at the front attack. There is no protective measure behind it. The only concern that Qingyu chose to attack was whether he could break the defense.

The bite of the frost plus the poison of convulsions, the negative effect of the double poison is enough to destroy the defensive measures of this leech. The fangs with venom easily pierced the pliable body of the leech, and injected the toxin into it. Immediately afterwards, Qingyu screamed and let go of her mouth, and her body quickly backed away.

A large amount of corrosive liquid sputtered from the place where the sapphire bite. The sapphire just now was hurt by the corrosive liquid on the fragile mouth. In just a few seconds, Sapphire's blood volume lost nearly a thousand points. The effects of corrosion continue to fall.

At this time, Yu Tu realized the scary place of leeches. The damage caused by that corrosive liquid has nothing to do with its own panel attributes. Moreover, looking at the venom of the sapphire that was corroded and broken, Yu Tu didn't want to get the liquid at all. Don't forget, he now has complete perception. The feeling of being corroded alive, it is estimated that no one is willing to try.

At the same time, Yu Tu also noticed that the leech's body should be filled with a lot of corrosive liquid. Qingyu's attack just now is a tragic example. Yu Tu's previous attack also opened several holes in its body. A large amount of corrosive liquid flowed out, and the site quickly became beneficial to the leeches.

"Huh, sure enough, there is no simple boss."

Yu Tu changed his attack method and began to consciously drive out the clumsy boss. Avoid further diffusion of corrosive liquid. The rest can only wait until Yu Shuang arrives. He alone is not enough.