According to Little Long Baobao, Mutant Fires and Star Fires are divided into several grades.
From low to high, they are white, blue, green, red, purple, black.
Among these fire seeds, there are innate ones and those that can be purified and enhanced through postnatal cultivation, like Little Long Baobao, his Lifebound Star Fire is blue, and as his age and cultivation increase, the color of his Mutant Fire has been changing from blue to green, and it is believed that it will eventually evolve into a higher grade of red or even purple.
The Mutant Fire that Ye Lingyue just devoured with the Qian Cauldron is light green with a tinge of blue, so it must be an Intermediate Green Fire of decent grade.
However, even though this Green Fire is an intermediate Mutant Fire, it wasn't directly devoured by Ye Lingyue, but needed to be finally refined through the Qian Cauldron, before she could obtain the Lifebound Pill Fire from the Fire Devouring Technique.
