The Seven Arcs

The Seven Arcs are the famous 7 Enhanced Armaments, each representing a star of the Ursa Major/Big Dipper. Some of it are currently in possession of some of the Kings. They are all known to be originated from the Unlimited Neutral Field. Their name are taken from Eastern Asia star names in "Seven Stars of the Northern Ladle", or in English, "Big Dipper". First four of them are originally placed in the deepest part of four underground dungeon located to the N/S/E/W of the forbidden city, with the remaining more powerful three stored inside it.

History

"The Impulse" - currently owned by the Blue King, Blue Knight, is a blue sword which possesses a high offensive ability. No other details are known.
"The Tempest" - currently owned by the Purple King, Purple Thorn, is a 1.5 metres long pewter staff in a shade of purple which has a strong lightning attack, according to Nickel Doll. No other details are known.
"The Strife" - currently owned by the Green King, Green Grandee, is a gigantic green shield which resembles a cross and has a yellow jewel in the center. It is used by the Green King as a shield to defend himself from the attacks of the Chrome Disaster, which apparently is on par with its attacks. The ability 'Double Payback' is an ability granted by The Strife.
"The Luminary" - previously owned by the White King, White Cosmos. It has the ability to control monster. This was used on Metatron, the guardian of said arc, to make her guard the Acceleration Research Society's main headquarters. However, it was destroyed by Silver Crow. It is currently unknown if it still exists at this point.^[1]
"The Infinity" - currently owned by Azure Heir, is a sword with infinitely increasing strength so long as it is sheathed. It has been used twice as of Volume 7.
"The Destiny" - previously owned by Haruyuki Arita, or the Silver Crow, is the armor of which the Chrome Disasters wear to create chaos. It was an Enhanced Armament that once belonged to Chrome Falcon, who cursed it to pass onto the killer of the previous owner. It is also known that it may not show up in the Items Storage when checked. As of Volume 9, it has been sealed in the residence owned by Saffron Blossom and Chrome Falcon.
"The Fluctuating Light" - in the center of forbidden city. Physically in the most core part of BB2039 central server, it is nigh-impossible to obtain due to numerous God-class Enemies having spawn points set in the hall where it resides. No other details are known.