Merely the Avernus Clan! I
The 9 Challenger Arenas were massive circular colosseum-like structures arranged in a round formation, their architecture being built with wonders of technomancy as they floated up and moved serenely in a set motion- a terrifying gravitational force supporting them as an obsidian crystalline platform shone below with arcs of Dissolution.
Around them, tall ancient trees radiating traces of Vitalis and Dissolution rose to the skies as they towered over the Arenas.
Noah's obscured figure appeared in the Challenger Area whose walls radiated a gold and black light, millions of throned seats stretched all around as he bypassed the main gateway where an Apex Saurischian Tyrannosaurus Beast was collecting 1 Unit of Havenly Aurora as an entry fee into this Arena to watch the battles of Hyperversal Extremities up close!