Lux is another form of currency you can get besides gold.
In order to unlock Primeval as a whole, you have to do a quest, The Land Above, which is located in Tower of Eternity, a Southern town in the kingdom of Sariila. After you completed the quest, you'll be allowed to access the first town in Primeval, named Buckleport.
You can spend your lux in a variety of ways.
- Buying an effects potion from Matilda at the Sick Dahlia.
- Enchanting your tools from Theodora the Enchantress at Bibliothecam Magnam.
- Installing sockets from Urist at Redhorn (in order to enchant your tool).
- Buying a field at Lemontree Plaza.
- Increasing rune capacity from Peter at the Sanctum of Serinity.
- Buying items from Felix at Lemontree Plaza.