The Crystal King's Throne
The Crystal King's Throne is a node of the Azurite Mine. It can only appeared in 130+ depths in the Primeval Ruins biome. Despite the mod text of the node stated "Contents Unknown", the node content is actually the boss fight of Aul, the Crystal King.
Upon arriving the node from the previous node, a portal will appear to led to the boss arena "Primeval Citadel". Despite "Primeval Citadel" and "The Crystal King's Throne" are actually on the same area instance (as well as the starting node, the path in between, Azurite Mine Encampment and surrounding area). The boss room also has internal use area id to allow the dev to just generate the room instead of whole Azurite Mine. Lastly, when exiting the boss room, the portal states it led to "Primeval Fortress", a name that shares with the upper level of the Primeval Chamber node.
After the boss fight has been finished, the node can be revisited. However, the boss room is no longer accessible under new instance.
Boss arena layout
The boss room has a simple circular layout, with the boss in the centre. However, there is a few cocoons around the edge that if you triggered too many of them. It will trigger bullet hell. Read Aul, the Crystal King § Mechanics and/or external video for details.
- Primeval Chamber another node of the same biome