In the seventh layer of the Devil Domain was a mountain. This was the tallest mountain in the seventh layer, and it was known as the Undying Mountain. Not only was the Undying Mountain the tallest in the seventh layer, but it was also the tallest mountain in the entire Devil Domain. The lofty mountain reached straight into the clouds, like a spectacular pillar in the Devil Domain. Even after existing for an untold amount of time, it still stood tall.

Growing on the mountain was a certain type of god-grade plant, the undying grass. A single stalk of undying grass would grant one eternal life, resurrect the dead, and return one's youth. Numerous people had tried to snatch some undying grass from the mountain, but none of the intruders had left alive.

That was because the Undying...