"I've called you all here to witness something that you all will go through IF you manage to reach my current level." Red states his purpose of gathering everyone.
"What is it?" Havvah is intrigued.
"We don't even know what level you really are…" Ahdem utters his thoughts aloud.
His words trigger everyone's curiosity.
Everyone, including Ahdem and Havvah, had sparred with Red from time to time. Red however, always limits himself to their respective levels during the spars. The most powerful each of them has seen Red is when Red shows them the maximum potential they can do with their current cultivations, giving them something to strive for.
"Then let me give you an idea." Red says, surprising the group.
Before they can even confirm if they really heard what they heard, Red opens up a portal to the treasure dimension and, "Come with me.", leads everyone in.