Details

Definitions:

Abyss: The place where demons live and where they can access the infinite worlds through the Gates of the Abyss

Gates of the Abyss: A portal on Alters of the Abyss where demons can be summoned to any one of the infinite worlds as long as a summoner with magic power and an offering is trying to summon a demon.

Heaven: Place where angels live and can be summoned to the infinite worlds

Purgatory Space: Space between a material world and Heaven or the Abyss. Acts as sort of a rallying point and home base for demons and angels that are fighting over a world.

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Angel Ranks:

Two Wings: Angel ==> Archangel ==> Principality

Four Wings: Power ==> Virtue ==> Dominion

Six Wings: Throne ==> Cherub ==> Seraph

(A/N: There is a rank above Seraph too I think, but it could also be that there is a divide between more powerful and less powerful Seraphs)

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Demon Ranks:

Low Rank (Low - Medium - High - Peak) ==> Medium Rank (Low - Medium - High - Peak - Half-Step) ==> High Rank (Low - Medium - High - Peak) ==> Demon Lord ==> Demon King ==> Seven Deadly Sin Demon King

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Soul Ranks:

Low Quality: Ordinary Souls. In the system, these ordinary souls are used to create items or body modifications.

High Quality: Fallen Souls/ Noble Souls. In the system, these souls are used to create skills or perks. Can also be used for body modifications and creating items too.

Superior Quality: Holy Souls and Evil Souls. Can be used to create new life through the system, but can also be used for other functions too.

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Power Scaling:

Angel = Medium Low-Rank Demons

Archangel = Peak Low-Rank Demons

Principality = High Medium-Rank Demons

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Power = Peak Medium-Rank Demons

Virtue = Medium/Low High-Rank Demons

Domination = Peak High-Rank Demons

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Throne = Low demon lord

Demon lord < Cherub < Demon King

Seraph = Demon King

??? (More Powerful Seraph, or another rank that I am forgetting) = SDS Demon King