Well, here is the Grade system so you guys can come back and check when you need. I will also be adding the monster levels here, just so you guys don't get confused.

Items, Chests, Pets and cards Cards use a Quality/Color system:

Common - White

Uncommon - Grey

Rare - Red

Epic - Purple

Unique - Blue

Legendary - Gold

Monsters, on the other hand, receive their grade based on their military standing on an army, taking into account the game of Chess as the mold for the army:

Pawn/Private -> Knight -> Rook -> Elite -> General -> King -> Legend

A Pawn/Private grade monster are quite weak, they are the mobs you find in Dungeons.

Knight grade and above are mini-bosses or bosses in said Dungeons.

Relationship System

This System is used to gauge the positioning of an NPC, a Monster, or even a Nation towards a Player, a Race or a Religion, and vice versa.

???? -> ???? -> Unfriendly -> Neutral -> Friendly -> ???? -> ????