Ruined Temple of Dellab
It has been reported that there is a long abandoned temple to the knowledge god Dellab in the Dark Forest.
Recently taken over by devil worshipers, there was last still a Chain Devil trapped there in a circle. But also in the basement lies a mysterious stone door, sealed with protective magics.
The temple was once a holy library and repository of knowledge, but has long been abandoned. The knowledge once within, is ruined and lost to the ages. Curiously, it seems that the priests of Dellab built the temple on top of a far older Netherese site. The foundations and under croft bear distinct Netherese desigh and iconography.