Asylum

The asylum was Khenal 's previous location before Glitterglen. There he did inhumane experiments on ponies possessed by daemons, among them Friesden. Friesden's possessor, Schmoe, helped her escape, and in the process liberated several other possessed ponies.

Basics
The Asylum was entrusted to Khenal because of his intelligence and natural knack with mental magics. Hugwax was hoping for him to either find a way to exorcise the daemons, or give controll of the hosts to her to use as an army.