Chpt 9 - Exploring the Auran Vale

Having ascended Heaven's Kiss and proven themselves to Krisella, Lasan, and the Rocs, learning of their ancient directive, the party seeks to make the Vale safe before dealing with the white sorceress. As they descend this depth, chasing mind devouring brains, what will they find? Why are the minds so aggressive? What is making the lake boil?