This mass of black water is precisely the flesh and blood of the Great Demon Xuanwu.
Just like black flames, black water is a high-density mana aggregate. Just as white dwarf star substance cannot exist independently from a white dwarf star, the flesh and blood of the Great Demon Xuanwu cannot exist apart from it. Why have I suddenly become capable of preserving this black water? The answer lies in the Solar Eclipse Fire.
More specifically, it depends on Earth Attribute mana.
The domain of the Four Symbols and Five Elements is complex and variable. Not only can the Vermilion Bird Fire be transformed into Yellow Dragon Soil based on the relationship between fire generating earth, but also achieve alternative changes based on the earth controlling water. The relationships of the Five Elements can refer to the relationships in nature; soil can retain water and become a fertile ground for plants, thus "earth" can restrain "water", and in turn be restrained by "wood".
