Train Survival: You're really trying to survive!

Su Li jumped back to her teammates in a few steps.

The battle was over, and my body relaxed, but a wave of discomfort washed over me.

"Let's rest for a bit." Song Mingyu cast a spell on Su Li to restore the energy in her body. "The energy flowed too fast, and there's no good way to deal with the residual effects. We can only let it take its course."

After saying that, Song Mingyu cast another spell on the giant catfish in the distance.

Su Li rubbed her shoulders, observing the newly appeared giant catfish.

This giant catfish, also a gold-level monster, sneaked in while Su Li was fighting the Corpse Dragon. If it weren't for Sun Keke's warning, they would have had a very difficult time spotting this gold-level creature.

This golden-level catfish uses shadow-type power. Despite its large size, it is very good at hiding and ambushing.

Given the intelligence of a gold-level monster, this giant catfish is most likely at odds with the Corpse Dragon and is trying to take advantage of the situation.

Su Li didn't go up to help either. He could beat a Gold-level opponent in a one-on-one fight, so it wouldn't be a problem for his five teammates to beat a Gold-level opponent as well.

The giant catfish in the distance grew weaker and weaker under the suppression of the crowd, especially after Sun Keke threw out a sphere containing a large amount of curses that hit it, causing it to age visibly.

Su Li was somewhat surprised and asked Sun Keke beside her, "Keke, what did you lose?"

This big catfish has grown from a young man into an old man who can now receive a pension.

Su Li had never seen this move before. She had seen that cursed ball before; wasn't it a skill that released poison? "Did you find some kind of time-based poison?"

Sun Keke smiled slightly, "How could I have such good stuff? My poisoning materials were actually props made by you, brother-in-law."

After saying that, Sun Keke took out the air candy that Su Li had given him earlier.

Su Li held the air candy, thought for a moment, and suddenly realized, "So that's how it is, the poison is made with oxygen."

The term "poison" is often a relative concept.

For example, capsaicin and menthol are highly poisonous to many organisms; if you eat them, you'll be lining up in the underworld to be served soup.

Chili pepper: Evolution, you gave me capsaicin to intimidate mammals. I need birds to help me sow seeds!

Peppermint: Evolution, you have given me a high content of menthol to fight off predators!

Just then, a terrifying upright ape dressed in animal skins came along, grabbed him, and swallowed him whole in an instant.

The upright ape was greatly alarmed:

My mouth feels warm!

It feels so cool on my lips!

Then we ate everything.

Many people have forgotten that oxygen is actually highly toxic to some organisms, especially those that have never encountered oxygen before.

Oxygen produces free radicals during metabolism, and these reactive molecules can damage proteins, lipids, and DNA. Aerobic organisms on Earth have evolved antioxidant enzymes to neutralize these harmful substances, but anaerobic organisms lack such protective mechanisms.

The biological cells in this world are exceptionally fragile in the face of oxygen. Song Mingyu's research found that the substances that make up their cell membranes are easily oxidized and broken by oxygen free radicals.

Of course, once you reach the gold level and the three flowers converge at the top, this problem will be greatly alleviated. This big catfish can survive even if it is thrown into a pure oxygen environment.

However, this oxygen poison, after being extracted and enhanced by magical energy, can completely penetrate the giant catfish's immune system. This is a matter of innate constitution.

The giant catfish, infected by the oxygen poison, experienced uncontrolled aging of all its cells, resulting in a significant decrease in all its attributes.

Seeing such a powerful aging effect, Sun Keke's eyes lit up, and she began to think about how to replicate this effect on other creatures.

The chaotic battle lasted for about half an hour. During this time, the giant catfish kept trying to escape, but each time Ivan used the power of shockwaves combined with gravity to hold it back tightly and prevent it from leaving.

Finally, after a fierce battle, the giant catfish had its head split open by Sun Lili's axe, its brain shattered, and it was no longer alive.

"Phew~ I'm exhausted." Sun Lili wiped her forehead. "My strength is much weaker than that Corpse Dragon."

"Hmm, but the Corpse Dragon probably doesn't have many ways to keep it alive; Shadow Leap is too cheesy," Ivan concluded.

Sophia clapped her hands. "Alright, let's clean up the battlefield. This time we're dealing with a gold-level monster, so there will probably be a gold-level treasure chest. Also, Ivan, follow the path the giant catfish came from and find its lair; there might be another treasure chest inside."

A gold-level treasure chest! Su Li and his group have only opened one gold-level treasure chest so far, and it yielded the divine item, the Theory of Basic Elements.

Ivan accepted the order and left, while Zuli was still savoring the experience of fighting against a Gold-level opponent.

In the past, the main reason they feared the Gold tier was that their stats weren't high enough. To compete against a Gold tier opponent, your stats need to be roughly the same as theirs to even be considered.

Having undergone years of training, Su Li and his companions have significantly improved their strength. With stronger secret foods, coupled with increased magical energy quality and the resulting numerical growth, Su Li and his group are now able to compete on the same stage as some Gold-level opponents.

Once the numerical value is reached, the second problem to face is the overwhelming power of gold-level magic energy.

Higher quality, purer magical energy will have an overwhelming effect against lower-level magical energy, much like a technological leap.

Su Li and his group achieved this effect through the theory of fundamental elements. By cultivating the theory of fundamental elements to a high level, their magical energy had been continuously purified, reaching the same level as that of gold-level magical creatures in terms of quality.

This is why other players felt that Su Li and his group's strength was a bit exaggerated.

After Su Li and his team achieved the two key indicators that allowed Golden Street to crush lower-level enemies, the competition between the two sides was now about technique and understanding of their own strength.

It was clear that Su Li and her companions had developed their own power far more effectively than these monsters who had not received systematic training. This was civilization crushing barbarism.

After testing her skills, Su Li is now even more confident in her upcoming battle against the evil god.

However, there are still some shortcomings. After actual combat, it was discovered that the eye technique puts more pressure on the eyes than expected. During battles, things are more rushed, and when releasing the Eclipse, the temperature fluctuations are greater, requiring more time for the eyes to recover.

While Zuli was still summarizing her experiences and lessons learned, Ivan had already arrived.

This time, instead of opening the treasure chest directly, he went to great lengths to bring three golden treasure chests to the vicinity of the train.

The three treasure chests from the giant catfish, plus the three treasure chests from the corpse dragon, made a total of six golden treasure chests, which made Su Li's eyes light up.