Not only did they journey to the northern side of the Beast Domain, but they were also moving radially closer to the center of the Beast Domain. They could clearly notice the growing difficulty of traveling through the Beast Domain.
The environment grew increasingly hostile to life. Their travel speed slowed down while they also began taking a larger number of breaks. Furthermore, the very act of taking a break became challenging because the number of regions and places where the two of them could take a break reduced substantially.
Everything became harder and harder.
Even food became more of a problem as even the crazy amount of food pills that Rui had prepared was being depleted.
They began hunting more as a result, relying on their environment for food while going back to the food pills only when the environment had nothing edible to offer. They increasingly began facing adversities that Martial Artists were generally not accustomed to facing.
