The reason the Six Great Demon Kings are attached to the Demon King Valley on one hand is a deep nostalgia for this place where they have lived for millennia. This location is rich with Spiritual Energy, and Heavenly Materials and Earthly Treasures can be harvested every decade.
But there's another very important reason: power. With a single command, the Six Great Demon Kings exercise authority as supreme beings in the Demon King Valley. No demon clan dares contradict their will or challenge their authority. Here, they are everything.
In the past, they have endured grievances, mainly due to the fear of losing their power and the Demon King Valley where they have survived countless ages.
However, as the Boundary Stele struggles to suppress the Crying Abyss, with the spread of black aura, the Demon King Valley might already be on the brink of collapse.
