I will update the content here as the story progresses (not just add).

This book divides power into two categories (Rank/Stars and Class) that work together to determine a being's strength.

Class

They are broken into nine stages based on the colour of the mana core. Below are the classes from weakest to strongest.

Black-coloured orb = 'Imp'.

Violet-coloured orb = 'Goblin.'

Indigo-coloured orb = 'Ogre.'

Blue-coloured orb = 'Giant'.

Green-coloured orb = 'Titan.'

Yellow-coloured orb = 'Goliath.'

Orange-coloured orb = 'Colossus.'

Red-coloured orb = 'Behemoth.'

White-coloured orb = 'Leviathan.'

Basically, it is black + colours of the rainbow + white.

Rank

No one knows how high ranks go, but as of now, there are three known ranks. The star equivalent is for humans, while the rank equivalent is for non-human species. A mana core possesses shining white stars in humans, while a non-human possesses dark orbs instead.

Rank 1/1-Star

Rank 2/2-Star

Rank 3/3-Star