Interest
Because the Linaton race didn't bother Nial too much anymore, he chose to spend the next few days taking a look at the other shelters.
When he had been in the shelters to assassinate the Linaton Ambassador of each shelter, Nial noticed a few things that attracted his interest.
He could visualize the shelters in their entirety when he emerged in the teleportation station of the respective shelter. Thus, Nial knew where he had to go even if he had never been to most of the shelters he visited right now. He had only been there to kill the Linaton Ambassadors, that was it.
All 'secret' organizations, created by other races, were trying to expand their territory of influence. They used the shelters in the territory of the origin human's race to achieve this as quickly as possible. Origin humans were useful thanks to the racial trait to bind five ability crystals to their mana core, after all.