Mortal World

Long ago in the Mortal World (尘世 chen shi), Long Chen's home world, there was a Great Dark War that shattered Martial Heaven Continent into 5 remaining pieces. The war left behind many tears in spacetime that interfere with teleportation across the realm. The Mortal World is only one world, coexisting alongside many other worlds and realms including the Immemorial Path.
== Great Dark War ==
According to Ouyang Qiuyu, an immense, heaven-shaking battle was once fought in the world. That battle changed the very structure of the world, and the Martial Heaven Continent was split into five pieces. Those are the Eastern Wasteland, the Western Desert, the Southern Sea, the Northern Source, and the Central Plains.
So the five regions weren't natural, but the result of an immense battle. That battle happened so long ago that it's almost impossible to trace back. The legends say it was a battle of gods, but as for how trustworthy legends are, it's up to each person's personal judgment. However, that battle was truly terrifying. It happened so long ago that no one can remember it, but there were many places where space was destroyed.
Although the world tries to recover, those old wounds left behind scars. As a result, there are many places in this world where space is too unstable to establish transportation formations.
== Wormholes ==
In regards to the structure of the world, this world is three-dimensional, but it is also a flat plane. 
A transportation formation functions by folding space, making it so two spots connect, turning the distance between them to zero. But this is on the condition that space is stable, as well as finding the correct spatial node. To learn more, one would have to go find a Formation Master, and they would be able to give a more detailed answer. 
This is how it is planar. But the world is also three-dimensional. The world is surrounded by endless planar spaces as well.
This is just a metaphor for how wormholes could be created in 2d space: by bending a piece of paper to connect two points that were originally far apart. One can imagine a similar type of spatial bending to create wormholes in 3-space. According to currently accepted theories (like general relativity and quantum field theory), the universe on the large scale is 4 dimensional (3 spatial, 1 temporal),if other theories like string theory are true, there could conceivably be more dimensions so one can try to imagine bending 4d spacetime to create wormholes. Creating a wormhole in the time direction supposedly allows one to travel back and forth in time.
== Multiverse, Parallel Worlds ==
To make an analogy, the world would be like a bubble, and there are also countless bubbles surrounding us. They are all tightly bunched together. It is also similar to a honeycomb, but we are surrounded by more than just six worlds. So don't think this is the only world out there.
Furthermore, there are worlds beyond those outside worlds beside us. However, we are isolated by laws from those worlds, so we can't see them.
One such parallel universe is the Wangu Road. The Immemorial Path is different from other secret realms. Secret realms are simply the remains of destroyed worlds that exist within the cracks of space. But the Immemorial Path is its own world, one on the same level as LC's world. 
Rumor has it that the Immemorial Path is a trial left behind from the immortal era. The secrets of becoming an immortal or god are within it. However, that world was wrecked. The damage done to it was even greater than what was done to our world, and it almost completely collapsed.
==References==
Category:Mortal World
Category:Location
Category:Terminology
Category:Astronomy