There will only ever be 8000 Loot Realms, 1 for each Loot ID. Remaining Realms are available to mint by anyone, even if you don't own Loot! Follow us on twitter for updates!
Every realm has been procedurally generated and is unique down to the language. Each realm has a map showing the regions, cities, rivers and topography that exist in the world. Each realm’s rankings will display the number of regions, cities, rivers, and harbors within the realm. Resource deposits and exclusive Wonders can be found in each realm with varying rarity.
The code to originally generate Realms was forked from https://github.com/mewo2/terrain under an MIT license.