The exploration area for the fourth exploration phase was four Star Clusters. They were considered as the center of the Flickering World in terms of geographical location.
Opening the new Star Field to the outside world was the dynasty's way of splitting the cost of construction. The third phase areas were basically properly split and highly controlled, so they were considered areas with high security. These four Star Clusters, however, were areas for all the forces to compete freely. The dynasty did not restrict the outside organizations from fighting for territory, so they were low security areas.
The external organizations would choose one or more Star Clusters to explore while at the same time fighting for their territories. At the initial stage of the exploration, these organizations focused on occupying their territories first before slowly exploring the further unknown areas.