"Access to my power." The City thought about this. Access would not give her the knowledge it wished to keep to itself. It would not tell her anything. She would just be more powerful. All the better, for it's wants.
"Yes. You can have access. But on the caveat that you never do this," Again it gestured to the circle "again. If you wish to speak to me, call me and I will come. But if you summon me like this again, I will cut off all of your access. Even that belonging to the others. You will have nothing."
Then it waved it's hand absently. "What you lot do to each other while you're here, I have no hand in. I need you only to be here. To live here. I ask that you kill none that I have brought in. They will be easy enough for you to spot. The others, the chattel, they are replaceable. Hurt the others if you wish, but make sure they can live still. Even if it's on life suspension."