The cohabitation between the three levels of Narva might have gone too far.
As the second level was left in the dust, the other two levels of contrasting qualities built a union. A union that helped both sides!
This was the origin story of some of the underworld organizations. They were supported by the nobles who provided them with funds.
In fact, it was almost a custom that each noble house should be associated with an underworld organization. That way, they get the influence in the underworld and conduct activities under the nose of the second level.
Meanwhile, the underworld organization would get a boost in productivity. They would become more nefarious and gather more members.
However, with this alliance came rules imposed on the organization by the nobles. For example, one of them was to never target nobles.
Another rule is to never target true mortals with no affiliation to the magical side of Arcadia.