Dokkaebi
There were five great elements– earth, water, fire, wind, and aether. All the other elements that were not these five elements were called hybrid elements. The hybrid elements were obtained by fusing the elemental affinities of two or more great elements.
Rankers who had an elemental affinity with only one or two great elements without any hybrid elemental affinity were most common among the lot. Those with hybrid affinity were considered rare.
The rankers who had hybrid affinity could make use of the elements their hybrid element is made of, a huge advantage over someone with only great elemental affinities. However, it was difficult for hybrid element rankers to rank up.
Each elemental affinity had its advantages and disadvantages of course. No elemental affinity or elemental nature could be considered superior to the rest.