The Age of Reason
The Sealed Door
Deep under Fourth, connected to the catacombs of the temple of Nausicaa lies an old pre-Tessarid ruin. Not much is left standing of it, except for a segment of tunnel leading to a large sealed door. The door has intricate carvings, powerful protective enchantments, and apparently there is an anti-magic zone on the other side of the door. The door has built into 5 slots, which seem to fit the Crystal Key’s.
There is no indication yet as to what might be behind that door, but the dragons that follow Adoniram seem to think it’s important enough that they had a couple of dragons in Fourth guarding it.