To the far north of the Rare Freedom Plains was the Dark Woodland.
This place was called Dark Woodland because it marked the border between Rare Freedom Plains and the Wild Nation, as well as the Rare Wilderness Plains.
Because the moment someone crosses the Dark Woodland, they will step out of the safety of Rare Freedom Plains, where Dark Being from the Wild Nation couldn't infiltrate.
The four powers had collectively built a thick wall called the Dark Pass, and their army bases were also behind this Dark Pass Wall. Anyone who wanted to leave the Dark Pass could as long as the four powers didn't want them.
But returning to the safety of the Dark Pass was another matter entirely.
Nevertheless, those brave, adventurous souls still dared to venture into those unknown territories, and some of them were also the people who either didn't want to be restrained by the four power or simply didn't fear death.