This was fire magic that transformed magical power into combustible matter. In the Western Continent, this was a very common means of attack, but in the East Continent, it seemed rather rare.
In the East Continent, this type of magic was classified as Elemental Magic of the Royal Dao, and not many people mastered it. The Dongsheng army, let alone the entire Dongsheng Empire, was predominated by the Ba Path, with the Royal Dao being a minor category.
However, one should not underestimate the Royal Dao because it's less popular; the Ba Path was prevalent mainly because it was easier to practice compared to the Royal Dao. The Royal Dao was not mainstream because this practice method required large quantities of materials and progressed very slowly.
Because practitioners could switch freely between the Royal Dao and Ba Path during cultivation, many practitioners of the Royal Dao might also delve into the Ba Path due to the frustration with slow progress.