New Myth and Old Myth

The grotto-heaven lay roughly 150,000 meters underground.

Molten lava trickled up from the depths like a surging tide, roaring and crashing.

The stone walls trembled faintly, softening at times and contracting at others.

Lu Yuan closed his eyes and listened carefully, sensing an unimaginably surging force, like the rumble of war drums. Ordinary people could not hear this sound. It was a psychic fluctuation with an extremely low frequency, pulsing only once every hour or so.

Thump! Thump!

For the first time, he was truly overwhelmed with shock. This was no grotto-heaven... it was a living creature's heart!

The underground tunnel they had just traveled through was merely... a blood vessel!

In other words, the Orbital Train had traveled thousands of kilometers along a blood vessel before entering the heart.

"This really is a corpse..."

"The corpse of an ancient giant demon?" he exclaimed in heartfelt shock.

"Grand Commander, stop daydreaming. We're here!"

Lu Yuan quickly came back to his senses and suppressed the doubts in his heart. Perhaps the underground people knew something, or perhaps they were simply muddling through their own little lives...

This was not the place to talk. They could discuss it after returning to their base.

"Distinguished guests, we have entered the grotto-heaven. Please disembark."

Da Dao Gang stood by the train doors and gave a bow.

Lu Yuan followed the others off the train.

Before them was an enormous train station, with railways stretching in every direction and connecting the entire "grotto-heaven."

Their high-speed train technology was clearly highly advanced.

There were also all kinds of gear-shaped decorations, showing that the Gear Civilization had deeply influenced this place.

The air was somewhat hot, perhaps around forty degrees Celsius. After all, below them was crimson lava—well, whether it was actually lava was impossible to say.