The site was tainted by the action and hallowed in the Force. Wandering off the platform and onto the broad promenade that led out of the city and to the Great Library, Ulic Qel-Droma was stripped of his ability to use the Force by several of his Jedi allies as punishment for his crimes. These actions created a vergence in the Force, tainting the entire area with dark side energies. Shortly after these events, Ossus was scorched by the supernova and Knossa Spaceport was reduced to twisted stone, metal, and heaps of rubble. In 3994 BBY, Ulic Qel-Droma made a pilgrimage to the site before visiting Yavin 4.
In the following centuries, as surviving tribes of Jedi and their descendants reclaimed the world and began calling themselves the Ysanna, this site's potent dark side allure was noted. To ward off the unwary from crossing these vergences, the Ysanna created a thirty-meter perimeter of astromech-sized black stones around each site. The Ysanna observed that those who crossed the perimeter and entered into the vergence would have their emotions twisted by the Force, seeing their closest friends as their most dangerous of foes.
- Nexus of Power