Magister Cultuum said:The Blair of Lacuna is a refuge that Ceridwen herself created for Os-Gabella. It was here that she raised Alexis and Flauros. Apparently they were the only mortals there. It was surrounded with rings of Runes to keep the unwelcome from entering from other planes and to keep prisoners from escaping. These same runes were used by Alexis to trap and devour her victims soul in the ritual that would turn her into a vampire. It probably contained great libraries of Ceridwen's arcane knowledge. I suspect that it may have been sort of of pocket dimension or a node where many world met. It would be sort of like the Shadowed Vale in that respect, but it would probably connect Erebus to many worlds instead of just Arawn's Netherworld. Obviously, it would be a source of Dimensional Mana. I'm thinking it could also be nice for it to have an event similar to the Letum Frigus Event that could help the Sheaim or the Calabim. It could be interesting if it would prevent any good civs' units from entering. Perhaps it could also stop summons belonging to anyone but the civ that owns it from moving into/near it (a more selective version of the Fear effect of the Necrototem), and/or strengthen spells cast there. I was thinking it could look nice if it appeared sort of like the Sheaim Palace surrounded by rings of runes.
i made this based off of MC's description for the FfH Mod