In the dark depths of the Netherworld lies a dungeon, a place teeming with gloom, filth, and untamed chaos. It was there that I encountered the strongest demon to have existed in countless millennia. He holds a secret of the Three Realms, a truth so profound that not a single word of it can be uttered. He is the nightmare of all deities and immortals, and the once-foremost devil of Fengdu, whose name has long since faded into the annals of history.