The first thing the geniuses did was unleash a barrage of spells before they entered Abyss. The clash between Lucifer's Order Force and Abyss' Chaos Force had destabilized the Crystal Wall, so it was easy for those beams of energy to reach the layers.
"¡BOOOM!"
Those spells' monstrous might pulverized dozens of layers in a second, and many more broke to pieces. It was shocking, but it made sense, considering that many geniuses' destructive power entered Rank 9.
That sight frightened the Arcdemons to their core. Despite their racial characteristics, they all had soul forces that granted them great intelligence and understood their situation.
Lucifer alone was powerful enough to handle the entire Abyss, and now they would have to battle an army they could not defeat. It did not take a genius to understand the level of psychological pressure the Arcdemons found themselves into.