What is fire...? According to my studies, mundane fire is not a physical substance like water. Instead, it is a reflection of something that can't be seen with either the naked eye or divine sense!
Fire is similar to an aura... a mixture of something illusory and something miraculous!
The only reason you can see it is because of the glow of light that results from its existence!
Multi-colored flame is the same.... In that case, a new question arises. What are souls? And why do souls produce multi-colored flame...?
By this point Bai Xiaochun was panting, and his eyes were as wide as saucers as he stared at the writing. Although only a portion of it was still visible, even the little bit he could read left him completely reeling. At the same time, the feeling of enlightenment left him gasping.