They continuously absorbed the newly obtained spells and divine skills, extracting their essence and discarding the dross to incorporate them into the Sect Secret Arts, allowing their disciples to freely choose their paths of cultivation according to their will.
One Secret Technique could be countered, ten Secret Techniques could also be countered, but when the number of the Sect Secret Arts at the Martial Debate Hall reached a hundred, a thousand, how could you possibly counter them?
Moreover, Nether Cultivators were precisely the most diverse in their cultivation system among the six major cultivation schools.
During the "Nine Heavens" era, players even jokingly called Nether Cultivators "Miscellaneous Cultivators."
They were unreserved, choosing to practice any spell that suited their fancy, hence the saying "no two Nether Cultivators in the world are the same."