Fate Soul: Representative of the world's will, they'll be able to easily gain powers and also possess heaven defying luck that sometimes save them from certain death. In exchange of this they have the obligations to save the world wether they're willing or not, because even if they're not willing, troubles will still keep knocking on their door and force them to interfere. Raizel and Saitama are examples of fate souls.
Power of Law: Ability to manipulate laws of universe. Every beings that were able to completely master a law will be qualified to join the ranks of godhood with millions years of lifespans. Examples of laws are law of life and death that belong to World God that reincarnate Raizel, or law of blood that belong to Raizel even though he merely touch upon it.
Seed of Law: A seed that will assist a mortal to easily comprehended law. However even with seed of law, a mortal is not guaranteed to reach godhood. Raizel's seed of space-time law is one of seed of law.
Demigod: Beings that able to touch law, end if they manage to completely comprehend said law, they'll be able to become a god. Raizel is a demigod himself since his power already touch upon law of blood.
I’ll update any terms in the future story so the readers can easily look it up in order to avoid confusions.