Demon Kings only bring their trusted people to their summit. Most of the time, they bring their right hands with them. In some rare chances, they bring the heirs to their throne. Their right hands will also usually succeed to their throne if something happens to their heirs. In a way, their summit is a way to show off the people who will replace them in the future.
Ilschevar has deemed me ready to dabble in the politics of the Demon Realm. I don't need to ask him to know there will be some kind of trial waiting for me at the summit. On top of officially introducing me to the Demon Realm, I bet he also wants me to get to know about my future opponents. I have a feeling that many of the heirs will attend the summit.
