The Spirit of the Arena?

"Holy crap! Since when did the River of Styx Sanctuary become so bold?"

Black Abyss's words were like a bomb dropping in the middle of the crowd, causing even the spectators who were simply there to observe to shift uneasily. Many people began to reassess Black Abyss's position within the River of Styx Sanctuary.

Originally, Black Abyss had been regarded as a talented figure in the River of Styx Sanctuary, having reached the Imperial Realm before the age of a thousand—a rare feat in the Underworld. However, due to his humble origins, he had never been given significant responsibilities within the sanctuary and often worked as a ferryman to the Lower Realms, holding a position with little real power.