C2543 Purgation by Sacred Fire
The Yin Yang Sacred Flame evolved into Yin and Yang. When the two combined, it could transform from the highest yin to the highest yang, or from the highest yang to the highest yin. This was the supreme flame of the Sword Pavilion's ninth level of the Fire Domain.
"So the flaw of your flying sword actually appeared here!" The moment the Yin Yang Sacred Flame appeared