Superstition!

They walked into the uneven tunnel that was brimming with the Fire Flowers and the shimmering mosses. Now and then, when they stepped on the soft spores by accident, countless glowing, colorful dust would spread out. Such a mysterious and amazing environment seemed to be leading the two of them into an unprecedented alien world.

The deeper they went, the more they could hear hums that were inaudible for the ears. Even the air, which was vaguely flowing, was filled with tiny waves and ripples, a sign that countless thoughts were colliding, entangling, and spreading.

What was known as "thoughts" were known as "information streams" by the moderners. Countless information streams rolled inside every intelligent life naturally and could be released by way of brainwaves after training.