Example: A player owns a Knight class Voxie. Once this Voxie character hits certain level milestones (lvl 5, lvl 10, lvl 15, and lvl 20) the owner decides to pay a VOXEL Token fee to change their Knight to the Warrior class. After the class change, the Voxie is represented as a Warrior within the Voxie Tactics environment. However, if the player decides to sell this Voxie on the secondary market, it will be sold as a Knight.