Realms can be bought via the Cubit Store. You can choose in which overworld you can place it, and you can also add a stamp to the realm by firstly clicking the stamp and then the castle in the overworld. They can be purchased in every size you would like, and you can choose between five different room biomes such as forest, tropical, arctic, desert and mountain. An empty realm could be also bought.
Realms can have various sizes!They range from 5x5 to 100x100.
Once spawned in overworld,its decay time can be doubled using a realm stamp.