(Well, since the four great spirits and four heavenly knights are really important to the MGQ Universe, I guess I can explain. The Four Heavenly Knights are four of the most powerful monsters in the world and most feared to humans. They usually have mastery over one of the main elements: Fire, Water, Air, and Earth. They serve the monster lord and are picked at the same time as the monster lord. The Monster Lord is chosen by a set of monsters challenging the monster lord's heir, the best one is monster lord and the next four are the Heavenly Knights. The Four Great Spirits each represent one of the four main elements and each live on a corner of the Continent between Ilias's continent and the Monster Lord's continent. If they deem a human worthy a spirit can become one with the human and give them the senses and power of their element, though the human must become one with the element to control it effectively.<br/>And that's all you really need to know about that.)