In this world, Summoner is the supreme profession. They communicate with other worlds through spiritual power and summon "star spirits" to fight for them. The realm of the summoner and the strength of the summoned beast strictly follow the "nine-star" system from low to high:
Three stars in the mortal realm: one star (Qi Ming), two stars (firefly), and three stars (candlelight)
Three stars in the spiritual realm: four stars (meteor), five stars (Chenyao), six stars (bright moon)
Three Stars of the Holy Realm: Seven Stars (Glory Sun), Eight Stars (Holy Glory), Nine Stars (Mythology)
