SPOILERS ALERT!! Do Not Look Under Monster Grading System.
Power Grading System:
Novice Grade
Apprentice Grade
Adept Grade
Expert Grade
Master Grade
Grandmaster Grade
Legendary Grade
Mythical Grade
????
Skills and Techniques Grading System:
Basic
Intermediate
Advanced
Master
Grand Master
Legendary
Mythical
Monster Grading System:
Lesser
Common
Greater
Elite
Abyssal
Legendary
Mythical
???
Note, this is currently for the world Ryker is living in, and he will travel to his previous world later on.