First Extinction
Ryu entered a cave region and began tapping the walls. Every time he did so, a ripple would occur in space, deforming the region.
His skill had already increased after just a few minutes. With a thought, he could make a maze of space. With every pat, he layered another maze on top of another, making the array more and more complicated. Even if someone of the Sky God by some miracle managed to sense him, they would take quite some time to rip through the protections he had left behind.
After he was done, Ryu made a final stack of space.
In the end, although the length of the tunnel was just a few dozen meters, it would feel like traversing hundreds of kilometers. This could still be considered a small distance to high level cultivators, but it was a different story if that distance was a maze.