NyxianDragons' Clan

They live on an island in the river between Shadow and Nature. They have a city, half built in the trunk of a giant tree, and half under ground. Deep underneath even the deepest of tunnels is the tombs, where Alden and Athena stay, caring for the spirits. Some believe them to just be stories, or that they're minor deities. Dragons are almost never granted entrance, and most who visit have accidentally fallen in when the roof collapses. They always seem to be expecting whoever falls in, and usually say it's fate that they were brought there.
There is only one entrance to the tombs outside of the ones that randomly open and shut, and it's inside Emerald and Aldrich's den, in the largest root of the tree. There are tunnels both in and around the root system, with the 'town square' and many of the shops being outside the roots, and individual dens being inside.
Usually dragons are only allowed in the tombs if a spirit guides them in there, or if, again, they fall in. Funerals only ever involve the tombs themselves if it was a clan leader, and even then only Athena and Alden do the rites. For normal dragons, there's burial grounds on both the Shadow and the Nature side of the mainland. These two areas are protected by Ebony, Fate and their progeny, both adopted and not. Spirits are guided to the tombs either by other spirits or by Athena and Alden themselves.