Power Levels (may contain spoilers)

Magic Cores/Aether Core (each circle is further divided into 9 stages)

1st Circle

2nd Circle

3rd Circle

4th Circle

5th Circle

6th Circle

etc.

Nether Body (Each is further divided into 9 stages)

1st Refinement

2nd Refinement

3rd Refinement

4th Refinement

5th Refinement

6th Refinement

etc.

Beast cores ranks (each with three smaller ranks: early, middle and late)

1st Rank

2nd Rank

3rd Rank

4th Rank

5th Rank

6th Rank

etc.

Elixir Grades

1st Grade

2nd Grade

3rd Grade

4th Grade

5th Grade

6th Grade

etc.

More will be added as the story progresses