Pasor had lived for a very long time and very few things intrigued or even remotely interested him. Getting lost in this cavernous abyss had him smiling. When he and Ariel descended into the dark hole they had immediately activated Rachel's perception and guidance spells.
They had done this for two reasons. Both felt imminent danger and they felt extreme disorientation.
Before Rachel allowed them to go she had given them everything Prashon had given her. It was sufficient for them to move in any area within the realm.