Training [1]
There existed a space.
It spanned several tens of thousands of kilometers and had an environment similar to a moon. For the most part, nothing about the space seemed off, however, that was only to the untrained eye.
If one had the ability, one would be able to see the strange and chaotic distribution of the spatial layers, the unnatural movements they made, and the sheer number of spatial cracks littering the air.
This area existed on the previously budding world that had just been born. After it and it's sister-seed bloomed, they latched onto the world and immediately raised its existence level to the point where it could support them.
Now, this world was no different than a middle world in many factors.
BOOM!
An explosion rang through the empty space. In a specific portion of the Mystic Realm, space imploded and collapsed inward, forming a terrifying black hole whose suction force could instantly raze 3rd class soldiers into nonexistence.