Rebellious Emperor Xuan Huang (Long Chapter)

The altar was far away, like a horizontal hill, majestic, ancient, and at the same time extremely strange.
Such a huge altar had only a piece of withered human skin, which seemed to be still dripping with blood, as if it had just been peeled off from someone's body and nailed to it by the small black and red wooden sword.
This scene is really too evil.
Why is there such an altar in Kunlun Jedi?
Is this a sacrifice to some unknown being?
Who does the human skin on it belong to?
Judging...