During the time of Master Cang Kun, both the Righteous Dao Alliance and Six Devil Dao Sects were supressed by him. Even the Great Elder of the Harmonious Bond Sect and the Righteous Dao Alliance Leader, the number one figures of both sides at the time, couldn't defeat that mad cultivator.
Once, a pair of Dao Companion elders had betrayed the Harmonious Bond Sect for some reason and turned to the path of the Ghost Dao, transforming themselves into living corpses. Later when the two made great sweeps in their cultivation, they wished to exterminate the sect, killing over a hundred disciples, before they were finally captured alive by several sect elders. By taking advantage of an ancient technique to erase their consciousness, they were refined into the legendary Yin Yang Devils.
War with the Seven Sects of Yue
After about 100 years, Moulan tribes launched an invasion. The final battle involved hundreds of thousands of cultivators. Long Han served as the commander of the Heavenly South Army and Divine Sage Zhu commanded the army of spell warrior. Devil Concord fought Yin Sifting Sect Master Fang. Harmonious Bond Sect released the Dual Yin Yang Devils from their restrictions. Before the culmination, Moulan received news about the attack of Soaring Tribes. Both sides stopped fighting and later agreed to unite against the common enemy.