Swiftly after the three Cerberus were killed, Alex hurriedly looted the bodies and checked their harvest from the fight. He and Aria then rested for an hour to recover their strength before entering the antechamber. The reason for their rush was because their meeting time was getting closer and they only have about 2 and a half months left.
When Alex and Aria entered the antechamber, they immediately saw a chamber with rivers of lava flowing under and between the ground while packs of hellhounds were seen roaming the terrain. Alex immediately realized that it was already night outside the Abyss pit as the hellhound's entire body was covered with blazing flames, signaling their innate talent [Creature of The Night] was currently active. This indicates that they are in [Fury] status and have an increase in strength.