As everyone knows, Pure Fire on Harmony Island is used to annihilate filth; those twisted, ugly monsters can't be killed by normal means and will continuously erode their surroundings, causing permanent pollution.
Therefore, the Chief Priestess of the Great Shrine of Harmony Island initially sacrificed herself, transforming into a gigantic Divine Sakura, and established a mechanism for a Chief Priestess to control the Pure Fire, using these eternally burning flames to eradicate the filth.
Of course, Pure Fire was, in essence, a stronger form of pollution; using it was merely drinking poison to quench one's thirst, postponing the time of Doomsday's arrival.
Lu Ban was curious about how exactly Pure Fire was constructed and how the Splendid Realm controlled it.
