Innermost and oldest section of Castle Scarwall, likely dating to the empires which formed post-emigration of the humans. 3-storey roughly cubic complex full of dormitories, worship spaces and a large underground cathedral.
When the Silver Stars explored it initially on the hunt for one of the four bound spirit 'batteries', they found the original pictographic runes and writing nearly entirely destroyed by subsequent defacement by a pre-Maelstrom cult of Repose / Reaper who remodeled it with skull motifs and cannibalism remnants.
The hierophant lich () guarded the cathedral level, and the temple as a while was eerily lightly-guarded past the external line of defense. The lich was felled by brutal strikes from Talox Za'ar with support from the other Stars as he weathered the necromantic power of the place.
Since the reclamation of the entire keep, this temple has been left more or less alone by the townsfolk, at least until the other portions can be restored to a defensible and livable state.
Keledekthe Journeyman appeared one night in the temple, spooking some men from town and alerting the Stars. He ultimately shared the secret of his travel with the party and spent time investigating the pictograms.