Train Survival: You're really trying to survive!

Su Li and the other two emerged from underwater.

Su Li pulled down her oxygen mask and let out a long breath. "I mean, shouldn't we find an underwater breathing spell?"

“This kind of spell is very rare,” Sun Lili, the unconventional mage in the team, chimed in. “This spell sounds simple, and it’s a standard feature in the game, but it’s actually at least a silver-level spell.”

"The most basic kind is the kind that forms a bubble to extract oxygen from the water outside. The middle-level kind involves covering the body with a respiratory membrane or transforming into the respiratory organs of a fish. The most advanced kind decarbonizes carbon dioxide within the body. They all look simple, but when you really think about them, they are incredibly complicated."

"At least Silver level? That's indeed very rare."

After listening to Su Li, she understood. Silver-level spells were still rare commodities for the current Blue Star civilization. Only high-level players possessed such skill books. Low-level players primarily used Iron-level skills, and even then, they were mostly the weaker ones within the Iron-level range.

No one would really think that the Black Iron-grade Magic Slash and Magic Shot are on the same level as the Black Iron-grade Sword Aura and Elemental Enchantment Arrow.

"I can try to develop a symbiotic plant that can help people breathe. But right now, it's just a rough idea, so don't get your hopes up too high," Song Mingyu said in a cold voice.

Su Li nodded quickly, "Give it a try. It's okay if you fail; we don't have any problems wearing oxygen masks."

Zurich plays mobile games, and even a 1% drop rate seems incredibly high to her.

Upon reaching the shore, the group returned to the train.

Song Mingyu went to analyze the sample that had just been cut off. Before giving it to Song Mingyu, Su Li cast an identification spell and obtained the name of the creature.

[Floating Beings]

The name is really simple.

Ivan also took some of the rock samples that Zuli had collected. Although Zuli had some relevant knowledge, he was certainly not as good as a mineral expert, so he handed them over to Ivan for analysis.

It took 20 minutes for Song Mingyu to return with her sample.

Su Li couldn't help but glance at the time. "Wow, that's fast. I thought it would take at least several hours."

"The situation was urgent, so I used a bit of Life Tide," Song Mingyu replied calmly.

Ivan followed him in, and as soon as he opened the door, he saw Song Mingyu. A look of surprise appeared on his handsome face, and then he subconsciously checked the time.

"Don't forget your sister Mingyu's exclusive equipment."

Ivan suddenly realized, "I thought I had misremembered the time."

"Alright, come in quickly and share the information." Sophia beckoned to her younger brother.

However, Su Li felt quite emotional. In the past, Song Mingyu would spend a long time analyzing the local creatures each time. Now, with the life tide born from the Cradle of Life equipment, it was like getting a time acceleration ticket in a game by spending money.

Su Li estimated that Song Mingyu was using a diluted solution of the Tide of Life; if she had used the undiluted solution, the speed would have been even faster.

"I'll get straight to the result." Song Mingyu handed the printed report to Su Li and the others. "The signs of human intervention are very obvious."

Su Li looked down at the report. This result was not unexpected for Su Li.

This floating island shows signs of human design from beginning to end.

In nature, it's impossible to find such a coincidence as a floating island with that kind of terrain, and a large number of planktonic organisms growing underneath it.

Looking at Song Mingyu's report, it fully introduced the performance of the floaters.

This is a biological tissue that can store energy. Its main body resembles a slime, with an outer membrane that is vesicle-like and extremely tough, comparable in strength to the fur of a black iron-grade monster.

It contains a large amount of highly energy-storing tissue fluid. This small piece, about the size of a palm, stores the equivalent of 300 kilowatt-hours of electricity.

Su Li was stunned. This fist-sized biological tissue could store 300 kilowatt-hours of electricity? The three large batteries in Su Li's car could only store 300 kilowatt-hours of electricity.

Before the destruction of Earth, a household electric vehicle had about 50 kilowatt-hours of electricity.

Zuli immediately labeled this thing as a treasure.

Not only that, but inside this treasure is a buoyancy core that consumes internal energy to continuously generate buoyancy. It is this force that lifts the floating island up.

The entire floating island is surrounded by a large number of floaters, which are distributed very evenly and regularly, perfectly lifting the floating island, which looks like an inverted box.

This is why, Song Mingyu said, the artificial traces are obvious.

"So, is their energy all provided by that umbilical cord?" Sun Lili asked curiously.

Sun Lili was referring to the thick root in the center of the floating island that connects to the seabed.

"Yes, but relying solely on this thick root is probably not enough to provide enough energy. When the internal energy is insufficient, these floating islands may sink due to inadequate benefits."

Su Li: Got it. You can play while charging, but it consumes a lot of power, and the charging speed can't keep up with the power consumption.

After Song Mingyu finished her report, Ivan took out the rock sample from earlier and continued, "Based on what Sister Mingyu just discovered, I think there is probably a huge geothermal energy station beneath these floating islands."

Ivan showed the smooth side of the rock sample to Zurich and the others, "Look at the patterns on this rock. These patterns are traces of melting and then cooling again. There are many of these patterns, layer upon layer, which gives the surface of the rock this peculiar appearance."

"In other words, many of the islands in this world are floating islands. These floating islands are man-made. At the bottom of these floating islands, there is probably seabed lava. These floating islands rely on geothermal energy conversion to increase buoyancy and make the islands float."

After summarizing, Su Li frowned, "But why would the creators behind this do this?"

The ability to create such a massive underwater project demonstrates the exceptional skill of its creators. However, Su Li couldn't understand why it felt so awkward, almost like performance art. Was there any special significance to making these islands rise and fall?

To raise various plants and animals?

Su Li looked at Sun Keke and asked, "Is there any mystical or ritualistic purpose involved here?"

Sun Keke hugged her teddy bear and shook her head. "In my experience, I can't connect this to any ritual. Perhaps these actions are to replenish the sacrificial offerings?"

I can't figure it out.