Lex resumed his studies on Abaddon, but they did not spend long within the blood rain. Something peculiar happened when they entered the blood rain - the flow of time in Abaddon became exactly the same as the Midnight realm.
The same had happened in the jungle, so Lex began to suspect that if they entered just locations within Abaddon, it would always affect the flow of time. Such a thing was not good for any of them - though the Reaving Dread did not seem to mind as much.
Lex, though, would prefer to come back to the Inn as quickly as possible. While there existed a possibility that he might spend a few decades within Abaddon, it would be best if only a short time had passed within the Midnight realm.
So they left. While the area with the blood rain was filled with treasures that could help him, so was the rest of Abaddon, so no one minded.