Master: City Lord - The most important person who owns valuable pieces of land in terms of material wealth, which is the premise for the development of the whole empire. Master can own more special buildings, resource mines, and monsters to support Heroes and Workers to develop together. The land are also divided according to the rarity of each area, the rarer the land, the percentage of resources and monsters spawning will increase gradually. The higher the level of the Castle, the more resources is mined, the number of monsters around the land is also stronger and gives more rewards for killing. Each Lord has the same functions and tasks to do with Heroes or Worker in their land.