Tier Items
Weapons, items, armaments are also categorized by Tier, and they are displayed on the information screen, and categorized by two digits, with the first referring to the weapon level and the second concerning its quality.
EX:
Nidai Kitetsu Green 3.1
Best katana created by the second generation of the Kitetsu family. She was cursed along with the swords Shodai Kitetsu and Sandai Kitetsu after being stolen from the Kitetsu family. A demonic sword.
• Tier 1 (White) - common armament / common items;
• Tier 2 (Gray) - unusual weaponry / unusual items;
• Tier 3 (Green) - rare weaponry / rare items;
• Tier 4 (Blue) - elite armament / super rare items;
• Tier 5 (Purple) - epic-mythical weaponry / Royal weapons / epic-mythical items;
• Tier 6 (Red) - Legendary Weapons / Imperial Weapons / Legendary Items
...
CREATORS' THOUGHTS 
Seven_sins_LORD
Seven_sins_LORD Unfinished list
Weekly Power Status
-- Power
Ranking 
-- Power
stone