In this world items and equipment are classified into the following ranks from low to high according to their capabilities:

1. Common Rank

2. Uncommon Rank

3. Unique Rank

4. Rare Rank

5. Epic Rank

6. Legend Rank

7. Myth Rank

8. Transcendent Rank

9. Divine Rank

10. Origin Rank

11. Concept Rank

These ranks will also have + or - added before them depending on whether they are stronger or weaker than their supposed rank but is too weak to be ranked in the higher rank or too strong to be ranked in the lower rank.