This symbol was naturally not a Möbius strip.
That was merely how Lin Ke interpreted it, and he had gleaned something from it.
By all rights, if the Four Symbols Sacred Spring extended deep underground, its water should have been heated to boiling by geothermal energy.
Yet Lin Ke had already been diving for several full days, and the spring water remained bone-chillingly cold.
In other words, something strange had to be at work here.
He channeled his Spirit Power, circled the entire glowing Spirit Power Light Screen, then dove downward.
Upon touching the Spirit Power Light Screen, he clearly felt the fluctuations of Spirit Power around him begin to change, but he was in darkness.
People could not detect minute changes in space through their senses alone, so Lin Ke needed something external to help verify his conjecture.
Thus, he immediately conjured a streak of flame produced by the Mystic Flame Horned Beetle Sovereign, wrapped it in Spirit Power, and cast it deeper below.
After traveling for roughly the time it took an incense stick to burn.
Lin Ke suddenly sensed a sharp attack coming from behind him.
Had someone discovered this place?
Yet there seemed to be no killing intent in this attack.
He quietly channeled his Spirit Power and dodged, only to see that the attack was the very flame he had wrapped in his own Spirit Power.
Just as I thought!
This streak of flame had actually appeared behind him, which meant...
Someone must have used Spirit Power to twist the space at the bottom of the Four Symbols Sacred Spring into the shape of a Möbius strip, not only connecting its ends but also making the passage of time impossible to perceive.
In other words, this was a space independent of the outside world.
There