In this world there are eight elements in total with its weakness and its advantages.
When the world was unbalanced with unpredictable weather and events 8 gods formed themselves into the 8 elements and balanced the world with its divine power. The gods are now sleeping in their element land somewhere in the world. It is said that only those who are worthy enough will be able to see the land and visit the gods. Sometimes, when the gods are awake they turn themselves into humans or animans and blend in with the others to observe what has happened and enjoy a bit of themselves or they will soar to the skies and visit other gods.
Each element has their own advantage and disadvantage against another element which is called the element cycle. Here's the cycle of the elements: