There was now a mystical connection between them and the Mind Palace that was similar to their connection with the Ocean of Blood through the flesh of the previous god of killing.
But this connection between them and the Mind Palace was stronger. Not only could they sense its direction like they can for the Ocean of Blood, but they could also sense its state, use its power, and command it to help them.
The first thing that they did with this power to command the Mind Palace was to sever the connection between the Mind Palace and every other telepath.
This action caused every telepath in the pathway, including the ones in the headquarters of the Mind Hunters, to lose access to the Mind Palace. Everyone was kicked out, and it caused an uproar.