A magical one-way wall/surface (Occultism-identified) used to spy on the rooms, likely to monitor prisoners/slaves. The party links it to an eye motif in the painting room and to teleportation (someone could teleport behind a painting to watch a room), and to Belcorra's earlier scrying of the party.
Most recently recorded in S37.
No open hook is currently recorded.
No open hooks are currently recorded.
No player-visible relationships are currently recorded.