"Booooooooom"
The fire dragon roared at the sky, and incinerates the demon with its fire. It like completely destruction of the demon, and the demon just turned to ash. This was the true meaning of fire- Incinerate everything, and turn everything into ash.
Fei naturally understands Fire Dragon Fist better since he have reached hundred percent of true meaning but he actually underestimated this power. It was completely above previous Angry Buddha Exploding the Heaven.
He merged fire force with his Fire Dragon Fist, and learned the true way to use this art. He needs to imagine this as Fire Dragon Fire Breath than that of Fist. Because like fire dragon, Fei punched out Fire from his fist, so he began to understand it better.
