This is subject to change as I'll update it over time.
________________________________________________________
Inferior rank -ER: I
Earth classification: Conventional grade
•These items are the basic items a human level, such as a regular knife, or sword.
Poor rank -ER: H
Earth classification: Unconventional grade
•These are items at a higher level where they can cause damage to more durable things like wood, walls, and metal at its lower ends, and affect up to a small building.
Normal rank -ER: G
Earth classification: Military grade
•These are items that by human standards cause mass destruction, the most powerful among them being able to level multiple city blocks.
-Bonding Requirement-
Items from here on require a soul bond to be used at any more than 10% of their full power.
Common rank -ER: F
Earth classification: National grade
These are items that at their top could force maps to be redrawn, able to flatten large mountains.
Uncommon rank -ER: E
Earth classification: International grade
•These are items beyond modern human technology, able to at their best annihilate multiple continents. Items with the power of the Demigods of myths.
Rare rank -ER: D
Earth classification: Global grade
•These items are ones that rival many gods of the myths, being able to affect up to a dwarf star.