C42 Return of the King
The Divine Martial Sect elders had expended a great deal of energy to imprison the Heavenly Flame, and upon discovering that the Heavenly Flame was actually the most trashy Bright Flame, they gave up on refining it. Otherwise, it wouldn't even be Xue Zhantian's turn to refine it.
The Elder would never have dreamed that the Fire Spirit had already mutated. There was a special ability