After William and his entourage cleared the 85th Floor, the Half-Elf decided to take a rest in order to allow his forces to take a breather.
A day has passed since they had entered the Dungeon of Atlantis, and they were practically bulldozing their way through it. This wouldn't have been possible if not for the three Nymphs who could practically see their targets from great distances and attack them without any shred of mercy.
According to William's estimate, it was very possible for them to conquer the Dungeon of Atlantis in three to four days.
Superbia had told him that Ahriman had given Felix an artifact that allowed him to teleport to hidden locations in the Central Continent.
This allowed the Demon Army to attack anywhere in the Central Continent whenever they wished. After her talk with the Sin of Pride, William found out Felix's new target, which made him frown.