Haughty Ignorance.

Legion didn't bother to argue with this strange god. She doesn't know their true identity and how they were responsible for killing tens of thousands of dragons and destroying their home plane in his realm. They are not going to tell her either because that would be exposing their identity in the void universe. As beings of great power, they know that information is power and can be used to track people. So they don't want to be baited into revealing their identity. Instead, they want to end this conversation as quickly as possible.

So Legion-1, "I will repeat for the last time. What do you want?"

She was bristling, but she forced herself to calm down. Even so, she still maintained an imperious tone as she spoke. "I have created a Pantheon. You should join it. It will be in your favor to do so."

She spoke as if she were doing them a favor. She thinks she is, but unfortunately, the 9 Crowns don't think she is doing them a favor.