There's several sub-realms
The main one basically just looks like an endless pool of shimmer from terraria with a light blue sky. This one is used sorta like a training area or guest room. It also has direct access to items from the second realm which are accessible by summoning them from the ground
The second one is storage, pretty much the backrooms but made of shelves full of powerful relics and a few large vaults with more dangerous ones in them
And the third is collector's house which pretty much looks like a regular house on the inside, but there's nothing but solid rock on the outside. The door is a portal which leads to either a universe outside the RoC or another sub-realm depending on where you intend to go
Caption this Meme
