There were a few specific people who focused on Roan's Death World, though. Some of them were from the Klacks Country. Or, to be more specific, both elders and participants from there were impressed by that. As a country that relied on evil arts, they obviously had many cultivators that used the Dark Element.
As mentioned before, one could use Dark Element as long as one could control Yin Energy. The better one got at it, the more proficient one could get at manipulating the Dark Element. For the Klacks Country, most of their cultivation techniques involved the five mainstream elements and the Dark Element acquired with the use of Yin Energy from such manuals. However, Roan was the very first person they had ever seen that had a natural Dark Element Affinity.
