While Iliana was running her scheme of finding out the Demon amongst the group in Death Howl, Effie, Sylvia, and Alexandra were already a few kilometers away from the secret entrance of the Dungeon.
They had been running for roughly half an hour, which was normally enough time for them to cover tens of kilometers, but they still hadn't arrived at their destination due to their fatigue.
Added by that, they weren't only running to their destination, but also escaping from the remaining Middle Class Demons Effie didn't manage to kill.
Their travel was greatly hampered by the Demons, as they had to constantly send some attack at the Demons to distract them. Their fatigue became worse in each passing minute due to the distressful situation they were facing.