13 Month Series

“	We are the 13 month series, a weapon created by a pledge. Until the day when our true master appears and we become one , we promise to continue the destiny of blood and the curse-This is a cursed power. We will dance as we wait for that day.	”
—Chanting from Black March and Green April as they both ignite

The Thirteen Month Series (13월 시리즈, 13 wol shirijeu; or "13 moon series") consists of an Arms Inventory and 12 sentient Ignition Weapons made by a craftsmaster, Ashul Edwaru. They are bestowed by the King Zahard to a formal Princess. In fact, the symbolic significance of the 13 Month Series is greater than any other weapon in the Tower..

About

It is said that the Thirteen Month Series were made from materials provided by Zahard. These weapons also vary in shape and function. For instance, one is a Needle and another a Hook. Out of these weapons, only the Golden November is the only S-rank. The 12 Ignition Weapons, when Ignited by the user, release vast amounts of power. It is said that only a formal Princess is supposed to be able to ignite a 13 Month Series, though Regulars such as Anak Zahard and Twenty-Fifth Baam have proven this to be untrue.

It is revealed that the thirteen month series together form half of the Key of the Tower that will unlock the floors beyond the 134th Floor. Apparently, the day Zahard announced that he would stop climbing the tower he divided the key into two parts. He gave the first half of the key to the blacksmith Ashul Edwaru. Ashul melted half of the key and turned them into 13 weapons, which Zahard made the princesses fight over them.

No matter how skilled the wielder is, they cannot force a 13 Month Series to Ignite. Depending on the weapon's personality, it may refuse to listen to its owner. Baam managed to ignite Black March, however Yuri Zahard was unable to do the same despite being a formal Princess. When weapons of the 13 Month Series meet, they will resonate and their owners can feel it.

Receiving a 13 Month Series

A Princess who has climbed the Tower and become a Ranker, might be chosen to become a formal Princess who is also called a "chosen Princess". Only a "chosen Princess" is eligible to receive a 13 Month Series, as she has proven her ability by climbing the Tower.

Rules Binding a Princess

When a formal Princess accepts one of the Series, she must abide by a set of rules:

1. She may not give or even lend a 13 Month Series to another person, otherwise they may be viable for execution by Zahard.
2. A Princess may own more than one weapon from the 13 Month Series, such as Yuri Zahard or Garam Zahard.
3. A Princess can refuse a weapon from the 13 Month Series. Heice Zahard, upon becoming a Ranker, was presented with a 13 Month Series but she turned it down for unknown reasons.

List of Weapons & Current Owners

The following consist of a list of the 13 Month Series, along with their previous and current owners.

13 Months Series Name Weapon Type Rank Owner Silver January Unknown Unknown An Zahard White February Unknown Unknown Unknown owner → Enne Zahard → None Black March Needle B-rank Yuri Zahard → Twenty-Fifth Baam → Anak Zahard → Androssi Zahard → Yuri Zahard → Twenty-Fifth Baam Green April Hook B-rank Anak Zahard (original) → Anak Zahard → Yuri Zahard Yellow May Unknown Unknown Maschenny Zahard Luminous June Sword Unknown Alphid Zahard Indigo July Unknown Unknown Yuram Zahard → Garam Zahard Blue August Unknown Unknown Garam Zahard Dark September Unknown Unknown Unknown Red October Sword Unknown Hagipherione Zahard Golden November Unknown S-rank Adori Zahard Colourless DecemberSealed Unknown Unknown Enne ZahardSealed Rainbow Undecimber Inventory Type unknown Unknown None

Notes and Trivia

• The 13 Month Series all have their names engraved on them. The engraving is in Japanese, because their creator Ashul Edwaru uses a language based on Japanese. SIU made it clear there is no significance behind this, as Chinese, Arabic and other languages are also used throughout this manhwa.
• The 13 Month Series is actually based on the lunar calendar where all months are based on moons.
• According to Random Webtoon Fan, the Princess who collects them all would be granted the right to bear Zahard's child. This has been revealed to be their official first purpose.
• According to Garam Zahard, the 13 Month Series was originally created by Zahard to split the Key of the Tower between himself and his 12 companions. Two would rebel once he decided to stop climbing while the other ten would stay loyal and become the heads of the 10 Great Families.
• In addition to bearing an individual sentient spirit, if any of Zahard's Princesses attempt to ignite more than one of the 13 months series at once, a malevolent ghost will possess them for no longer than a week but use their bodies to go on a rampage; wreaking havoc and causing them to be branded insane and hunted down by the authorities. It was a deal that Zahard set up with the spirit of a failed Princess candidate from the first generation to prevent any Princess from collecting all 13 Month Series.

Navigation

Items

Unclassified Items Express Ticket • Suspendium • Zygaena's Flower • Key of the Tower • Bell of Dawn • Soul-Stirring Ladle • Wing Tree Badge • Hockney's Painting • Ancient Cloak For Trapping Evil • Ancient Demon's Spell Book • Test Admin Badge • Long Life Game • Karaka's Armor Suit • Eyes of De Jah • Hockney's Lantern • Zahard's Ring • Arlen's Pocket Hidden Floor Items Zahard's Bracelet • Mirror of the Past • Mirror at the End • Master Key • Good and Evil Monitor • Hidden Floor Villain Scroll • Format Pill Workshop Technology Shinsu Teleportation Device • Shinsu Warp Device • Workshop Patrol • Emile • Floating Ship • Floating Castle • Mirotic Remote Control • Sleeping Drug • Segregation Drug • Observer • Lighthouse • Pocket • Mirror at the End • Mirror of the Past • Shinsu Measuring Device • Hell Express • Stone Doll • Ignition Weapon • Sealing Device • Sealing Chamber • Bong Bong • The Rice Pot • Portal • Enna Core Upgrade Kit • Light Flowing Through The Waterfall • Ignition Liquid • Antimatter Bomb • Sealing Ship • Summoning Well • F2D-426 • R-7 • R-9 • Guide Robot • Cat Tower Green Acid • Boiling Acid • Pipes • Jump Pad • Blood Tamara • White Heavenly Mirror • Hidden Floor • Compression Flask • Light Ball Devices Section Inventory Types Arms Inventory • Armor Inventory • Reel Inventory • Pocket • Lighthouse • Great Whaley • Carrier • Manbarondenna • Pipes Armor Inventory Mule Glove • Karaka's Armor Suit Arms Inventory Rainbow Undecimber Lighthouse Eyes of God • Ha Yura's Suitcase • Opera • Enna Core Upgrade Kit Observer Little Bee • Purple Dementor • White-X • Purple Eye • Baby Growler Unclassified Device Pulley • Wand • Reel • Frog Fisher • Adam's Glove • Ancient Frog Pollack's Well • Shinsu Reactant • Good and Evil Monitor • Stealth Anklet • Flying Launcher Weapons Section Basic Weapons Types Spear • Hook • Sword • Wand • Shinsu Bomb • Needle • Shield Hooks Green April Needles Black March • Kranos • Orange Snake • Lecalicus • Cherry River Needle • Coelacanth • Leviathan (Lecalicus) Spears Mago • Great Blue Spear • Mad Shocker • Unnamed Ancient Spear • Vagnil • Flying Fish Spear • Stone General's Spear • Spear of Sphere Swords Cullinan • Donghae • Krishna • Luminous June • Narumada • Red October • Silver Moray • White Oar • Spinel • Black Mandarin Wands Jeok's Wand 13 Month Series Golden November • Dark September • White February • Silver January • Yellow May • Luminous June • Indigo July • Blue August • Red October • Colorless December • Rainbow Undecimber • Black March • Green April Compression Weapons Mago • Green April • Tiara's Quill Pen Ignition Weapons Donghae • Emile • Enryu's Thorn • Great Blue Spear • Krishna • Kranos • Lecalicus • Mad Shocker • Mago • Narumada • Vagnil • White Oar • Unnamed Ancient Spear • Coelacanth • Leviathan (Lecalicus) • Spear of Sphere • Black Mandarin Unclassified Weapons White Heavenly Mirror • Shining Fan • Sylpheed • El Robina • Essence of Bravery • Sniper Rifle • Mysterious Weapon • Boomerang Blade • Woon's Hammer • 7 Sacred Swords • 13 Month Series • Snow Blaster • Fangs of Wild Beast • Zubizarreta • Lefav Faust