Demassia is a world where magic and quarrelling prevail, with various occupations such as summoner, imperial doctor, puppet master, element master, knight, warrior (swordsman), fighter, animal trainer and alchemist. According to the records in the book, only those who have strong spirit and can understand the elements of the world can become magicians. Magicians are divided into eight grades: trainee magician, junior magician, intermediate magician, senior magician, big magician, magic guide teacher, big magic guide teacher and holy magic guide teacher, and each grade is divided into stars, with ten stars as the first grade, so as to distinguish the strong from the weak. Summoner, magic doctor, puppet master and element master are all magicians' multiplied occupations, with different requirements, but the division of grades is the same as that of magicians. There are eight elements in this world, wind, wood, water, fire, earth, thunder and lightning, light and darkness. Each kind of magic is divided into six levels according to the strength of mana use, namely "primary magic, intermediate magic, advanced magic, ultimate magic, forbidden spell and great forbidden spell". And quarrelling is much simpler. There are only three occupations, which are divided into junior soldiers, intermediate soldiers, senior soldiers, swordsmen (warriors and knights), great swordsmen (bronze warriors and earth knights), great swordsmen (silver warriors and Skyrider), great swordsmen (golden warriors and bright knights), great swordsmen (saints and holy knights) and sword gods (gods and warriors). Like magic, each level is divided by stars, and a level has ten stars.