Tong Xuan Gate once held sway over the Mortal Life Path of Mount Wutai.
In other words, it was the Sect Leader of the Mortal Life Path, similar to the Ziwei lineage of Kunlun, the Emei lineage of Shushan, and so on.
Unfortunately, about four thousand years ago, Tong Xuan Gate suffered a catastrophic disaster.
Almost everyone was violently killed, leaving none behind.
Without delving into the specifics for now, one can see from this that the strife within the Demonic Path is far more bloody than that within the Orthodox Sect, with hardly any chance for a peaceful transition.
After all, the journey of Cultivating Immortality is fraught with unexpected turns. A nobody could suddenly come into a rare treasure or a fortuitous encounter with an elder, and then begin to "resent the poverty of youth." Who could stand that?