Sinfar is made to be a very dynamic world. It is possible for anyone to build their own area using the game's editor (the Aurora Toolset).
How to Build or Modify an Island
You need to be a Sinfar Builder. Sinfar Builders are chosen by Mavrixio or Spankitty based on the following criterias:
The idea/concept that they want to build
Their building skills
How trustworthy they are
A builder can be banned or removed from buildership at any moment if their actions are judged detrimental to the server or they use their builder wand for their personal use.
You can have only one builder/DM account per person.