The Chosen System: Counterattack with Husband

When Rong Yan saw the stone walls on both sides suddenly bounce open, he shouted loudly to Xu Yiyu without thinking.

"Watch out on both sides!"

Rong Yan's reminder was very timely, and Xu Yiyu also noticed the dark holes that appeared on both sides out of the corner of his eye.

As if a sudden inspiration came to her, she moved as quickly as she could, lowered her body center of gravity with the outdoor bag on her back, and lay down on the bridge.

The next moment, several rows of hidden weapons that looked like hidden arrows flew out from the holes on both sides. Xu Yiyu only heard the sound of several arrows breaking through the air, and then he saw with his peripheral vision a scene of countless arrows nailed into the wall on his right.

Lin Yi and Rong Yan's hearts, which had been hanging in their throats, finally fell back. If the two of them hadn't supported each other, they would have almost fallen down on the stone platform.

Everything happened in just a few seconds, and they almost thought Xu Yiyu was unable to react.

Xu Yiyu lay in this prone position, trying hard to ignore the extreme heat and cold brought by the flames and ice crystals, and glanced at the cold arrows nailed into the wall on the right.

If she had not reacted quickly enough, these arrows shot at her waist level would have shot her into a sieve.

After more than ten seconds, the black holes on the stone walls on both sides disappeared. After Xu Yiyu carefully confirmed that the two holes would not open again, he stood up at an extremely slow speed.

When she was lying on the bridge just now, her face was almost burned by the hot stone surface. Fortunately, she used her arms to cushion it. Otherwise, the lightest consequence now... would be disfigurement.

The bridge was narrow, and Xu Yiyu was afraid that he would fall down if he lost his balance. The time it took him to stand up straight was also longer than the first time the mechanism was triggered.

Lin Yi and Rong Yan had no intention of rushing her. Instead, they hoped that she could move slower.

When Xu Yiyu stood up straight, he once again thanked his own son in his heart for optimizing all aspects of his physical qualities in advance, and secretly breathed a sigh of relief.

If it was the ordinary Xu Yiyu from before, he would have become the nutrient of ice and fire by now.

She didn't look back, but raised one hand above her head and made an "OK" gesture to Lin Yi and Rong Yan behind her.

At this time, Xu Yiyu was nearly seven meters away from the stone platform. The ropes tied around her and Rong Yan's waists were gradually propped up and swayed gently in the air, and it was obvious that a lot of the excess was gone.

She estimated the remaining half of the distance and found that she still needed to pass five black diamond tiles before reaching the other side.

Fortunately, Xu came to test the waters in advance. If Lin Yi and Rong Yan took the lead, they might not have reacted as quickly as she did.

Xu Yiyu thought for a few seconds, turned the outdoor bag on his back in front of him to take a look, and then froze in place.

——There is a shiny iron arrow wrapped around the adjustable elastic strap at the opening of the outdoor bag, and there are even some strange green strands on the arrowhead.

Judging from the angle, one of the arrows in the row with the lowest height happened to be entangled by the straps on the surface of the bulging bag when passing the stone bridge, and then got hung on the bag.

Xu Yiyu didn't dare to touch the arrow easily until he took out a tissue from his coat pocket and spread it in his hand. Then he carefully took the arrow out of the bag by the feathers through the tissue, and threw it into the blazing fire on the left without any hesitation.

The flames engulfed the arrow in an instant, and Xu Yiyu didn't even hear the sound of the arrow falling to the bottom of the pit.

After putting the outdoor bag back on his back, Xu Yiyu continued walking along the narrow bridge towards the stone platform opposite.

For a moment, cold sweat broke out on her face, and she was extremely grateful that the arrow only hit the bag instead of herself.

When he stepped onto the third diamond-shaped floor tile, Xu Yiyu walked towards the fourth black diamond tile without any pause.

She heard a sound above her head, and walked faster and more decisively.

Rong Yan and Lin Yi had already stepped onto the bridge one after the other. They were trying to maintain their balance with some difficulty, but they also saw the silver fluid pouring out as the cave opened.

When Rong Yan saw the silver fluid falling on the rope, his steps stopped uncontrollably.

He knew what the silver liquid was.

——Mercury, commonly known as quicksilver, is a highly toxic substance.

Fortunately, Xu Yiyu did not look back, otherwise——

She should be suffering from mercury poisoning by now.

The mercury that poured into the stone chamber fell on the rope connecting the two people, and most of it fell on the diamond-shaped brick that Xu Yiyu had just passed by, covering it almost exactly.

Rong Yan almost subconsciously took out the two masks he had prepared in his pocket, handed one to Lin Yi without any delay, and quickly put it on himself.

When mercury is heated at high temperatures, it will evaporate into a highly toxic white mist, which is extremely harmful to the human body.

There was a blazing flame to the left of the three people, and it was almost a matter of time before the mercury was evaporated by the high temperature brought by the flame.

Although the protective effect of masks against this kind of fog is extremely limited, it is better than no protection at all.

"Ms. Xu, if you have a mask, you'd better wear it now. What just fell on the bridge... is mercury."

Rong Yan reminded Xu Yiyu loudly without turning back. Xu Yiyu was just startled for a moment, then quickly took out the mask that he always kept in his pocket and covered the lower half of his face as quickly as he could.

As a standard liberal arts student who had serious academic imbalances in high school but still remembered some basic knowledge of chemistry, Xu Yiyu certainly remembered the properties of mercury.

Although mercury will seep into the body through the pores of the skin after evaporation, it is better to smell it as little as possible to avoid more serious poisoning.

If Xu remembered correctly, there seemed to be an item in the system mall that could detoxify. After Tongzi updated the version, she would definitely exchange three of them and find a way to let Lin Yi and Rong Yan use this item to detoxify the mercury.

Although it would be foolish to talk about toxicity without considering the dosage, she still wanted to be more cautious when facing a highly toxic substance like mercury.

"Be careful! Don't step on the second black diamond brick on the way across the bridge. Don't get hurt!"

In order to give them a reminder, Xu Yiyu turned around and shouted to the two people who were already on the bridge.

Seeing with her own eyes the mercury attached to the black diamond-shaped area she had just stepped on, she really felt that she had survived a disaster.

Ruthless, too ruthless.

The owner of the underground palace is very cruel to outsiders except for Xuanmao, who is "his own".

The black cat sitting on the stone platform at the other end of the bridge seemed dissatisfied with its master's arrangement. It tilted its head and meowed in a certain direction in the void with a hint of complaint.

Xu Yiyu didn't know whether the owner of the underground palace, who was not sure whether he was still in the human world, heard it or not. Anyway, she heard a hint of complaint in the tone of this mimi.

Wow, this is the confidence of being your own cat!

When he reached the fourth black diamond-shaped brick, Xu Yiyu stopped trying and simply stepped across the bridge. He didn't want to experience the sense of crisis of life and death in a single thought again.

The flames and ice crystals seemed dissatisfied with Xu Yiyu's move. They gathered all their strength and rolled up again, preparing to launch a third wave of attack on Xu Yiyu.

Xu Yiyu felt that half of his body was about to be roasted, while the other half was so cold that his hands and legs showed signs of being about to freeze.

Okay, okay, I'll treat her like this if I don't help you complete the rated KPI of "Hopscotch", right?

If there weren't two companions connected to the other end of the rope, she, Xu, would really not serve!