Akashic Records: Its is the result of the mutation to the Records of Existence, think dao records from xianxia goes through a mutation and becomes the akashic records from everyone else is a returnee, which changed the reality of the world.

Mark of Cain: When Cain killed his brother with the devils nail. God punished him by sending him to the moon to watch over all of humanity's sins, giving him the mark to prevent him from dying so he could watch over humanity's sins for eternity. Over time, through his understanding of sin he became a God of Sin, this affected his mark changing it to the Mark of Cain. To gain the mark of cain one must go to the moon and go through the Dungeon of Cain and kill him by destroying his body and soul. This is easier said than done due to how powerful Cain is, the fact that if there is even a little bit of him left he will recover back in an instant, and that little is known of the exact location of the dungeon.

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Mark of Cain effects:

1. Gives the bearer semi-immortality, only being able to die if you were killed in your entirety.

2. Allows the bearer to know the intentions of others.

3. Allows the bearer to know the sins of others.

4. Gives the bearer the ability of absolute sight limited to the planet they are currently on.

The role the Mark of Cain played in going back in time: He used the records of when cain watched over everything on earth that was held in the Mark of Cain. This worked because at the time before the fusion of universes, earth was the only planet with intelligent life due to the dimensions low concentration of mana. The reason the earth even had life was due to having a small probability of life forming does not meaning there is no possibility, it’s one of those things were as long as there is a chance of something happening it will eventually happen.