The Corpse Refiners were indeed a poisonous tumor upon the land. The world of immortals had been at peace for the past two thousand years and it wasn't until qi reawakened on Earth that the sect overseeing the Truespirit Major began to stir.

That was when Lu Yun discovered that they hadn’t submitted to the immortal dao at all. They were parasites within the dao, much like the Dao Tree had once been. Thus, plots and schemes on the world of immortals activated against Truespirit Major and Lu Yun prepared to move against the Corpse Refiners in the secondary worlds.

The World of Swords was immensely sapped of vitality after two thousand years of struggle...