Blue Rose Sword

The «Blue Rose Sword» (青薔薇の剣) is a Priority Class 45 «Divine Instrument» class long sword found in the Mountain Range at the Edge. It is the personal weapon of Eugeo, and was highly coveted by the knights in the Underworld. Its appearance is pure white, in contrast with Kirito's Black Sword, and is inscribed with a blue rose at the center of its guard.

Background
The sword was created from an eternal block of ice from the «Mountain Range at the Edge», with a single blue rose that had been frozen within it, before it could wilt.

According to Eugeo's vision of the sword's origin, the Eternal Ice was alone, at the very top of the mountain, where it was frozen even in the summer, until a single seed landed near by. The ice began to melt itself little by little, each day, until the seed became a blue rose. From then on, the Ice and the Rose talked to each other as friends. However, eventually, the Blue Rose asked to be frozen by the Ice, as it could not endure the cold for much longer. And so the Eternal Ice did so, freezing the Rose and itself together, forming into a sword, with the Rose shut away within it.

At some point after, it somehow ended up within a cave, with a White Dragon guarding it and the Human World, just as 3 other Guardian Dragons, scattered throughout the Human World. According to fairy tales, Bercouli (the founder of Rulid Village) tried to steal it from the white dragon who protected the «Human World» but was caught, though he was later forgiven for the crime. However, when Bercouli became an Integrity Knight, Quinella had ordered him and the Integrity Knights to massacre the Guardian Dragons of the North, East, West, and South, because she could not control them. For unknown reasons, Bercouli did not recover the sword after killing the Northern Dragon.

Abilities
As a priority class 45 weapon, the Blue Rose Sword has exceptional strength and cutting power, seen when it was able to cut the demonic tree Gigas Cedar. It is has also shown to be highly durable as it was able to withstand Deusolbert Synthesis Seven's fiery punch despite the obvious advantage fire had over the ice-powered sword. Like Kirito's Black Sword, the Blue Rose Sword also has the ability to respond to Eugeo's will, shown during the fight with Deusolbert, where the sword answered Eugeo's cry not to lose, and stopped the Integrity Knight's attack and extinguished his flames. Its high priority class also allowed it to use Sword Skills of up to four consecutive hits, when wielded by a competent swordsman.

Armament Full Control Art
With the «Armament Full Control» art in effect, the sword is capable of covering a large area in ice when sunk in the ground. Everyone within the area is then entangled in fast growing pinky-thick thorny ice tendrils, which quickly freeze their targets in blocks of ice. If the wielder then shouts the command "Bloom Blue Rose" an infinite number of large profound blue roses grow and leech the «Life» of the victims encased within the ice and turns it into Sacred Power, which is released into the area for use.

According to Eugeo, these abilities are not meant to kill, but rather to trap one's opponent. The degree of power of these abilities also varies depending on which armament state the user has initiated. In the first, «enhancing», stage the sword can cover an area of ten meters in frost, where the ice tendrils then ensnare and freeze opponents, and can produce ice roses that drain «Life» at a gradual rate. Upon entering its second, «releasing», stage, the swords sends out a rapidly expanding bluish white circle, which instantaneously freezes the surrounding area. In this state, both the freezing and «Life» drain abilities are greatly amplified, to the point where boiling hot water can easily be frozen solid, and the roses produced are actual blue roses, as opposed to the first stage's ice ones, which sap «Life» at a greater rate. However, maintaining these abilities requires great mental focus from the sword's user and, as with all «Armament Full Control» arts, it uses some of the sword's «Life».

Alicization Beginning


During Prologue I of Alicization Arc, the sword was found by Eugeo, Kirito, and Alice Schuberg, but, as it was extremely heavy, it was left in the cave.

4 UW years after the events of Prologue I, Eugeo returns to the cave to retrieve the sword and uses his rest days to move the sword from the cave to the storage hut near the Gigas Cedar over the course of 3 months, moving it by several kilometers each time and hiding the sword in the forest at the end of each rest day. Once he successfully transports the sword to the hut, he stores it there with the Dragon Bone Axe.

6 UW years after the events of Prologue I, Eugeo shows it to Kirito, who attempts to use the sword to cut down the Gigas Cedar, but fails to do so due to his OC authority being too low at the time to use the sword properly. After the fight with the goblins at the Mountain Range at the Edge, their OC authority reached a level at which they are able to wield the sword properly and use Sword Skills with it, which they use to cut down the Gigas Cedar in several days. Afterwards, it became Eugeo's personal sword with Kirito occasionally borrowing it.

Alicization Running
After Eugeo and Kirito are accepted into the Sword Mastery Academy, Eugeo keeps this sword in the drawer underneath the novice trainee dorm bed, as the Academy rules only allow Academy issued wooden swords for group competitions and practical exams.

Near the end of the first year in the academy, Kirito wants to borrow the sword to be able to show his 4-hit Sword Skills to Sortiliena Serlut, but Eugeo reminds him that his own sword from the Gigas Cedar branch should have been completed by then. After this, Kirito no longer needs to borrow Eugeo's sword, as his own sword's Priority class rivals the Blue Rose Sword.

Alicization Turning
As before, Eugeo is unable to use the sword for group practices and practical exams due to the Academy rules, therefore, the sword is only drawn during its weekly maintenance. However, one day, when Tieze and Ronye are late to come clean their seniors' rooms and Eugeo finds out that Raios Antinous and Humbert Zizek plan to exercise their right as upper-class nobles to punish the girls by raping them, Eugeo uses the sword to stop the upper-class nobles and unintentionally cuts off Humbert's arm.

When they're taken by Alice to the Central Cathedral, Tieze brings the sword to Alice and it's taken with Eugeo to the Cathedral, where the sword is stored in the Cathedral's equipment vault on the 3rd floor.

Alicization Rising
After Cardinal helped Kirito and Eugeo escape the Integrity Knights, she taught them how to use the «Armament Full Control» art for their respective swords. Later, while Kirito was struggling with Fanatio Synthesis Two on the 50th floor of the Central Cathedral, Eugeo used the «Armament Full Control» to trap four integrity knights and Fanatio Synthesis Two.

When Eugeo and Kirito reached the 80th floor, they met Alice Synthesis Thirty and engaged in battle. While Kirito was distracting Alice, Eugeo once again used his «Armament Full Control» art in order to trap Alice to gain some time to use his dagger, however she broke free out of the ice within seconds with the use of her Fragrant Olive Sword.

Alicization Dividing
Eugeo used the sword in his battle against the Integrity Knight Commander, Bercouli Synthesis One. Eugeo attempted to surprise the Knight Commander with «Sonic Leap», but Bercouli repelled him with the «Armament Full Control» art of his Time Piercing Sword. The Knight Commander then let Eugeo complete the first stage of his «Armament Full Control» art, and, once the ritual was ready, Eugeo charged Bercouli with the sword, which Bercouli seemingly shattered. However this was revealed to be Eugeo's plan, as what was destroyed was an icicle, which offered no resistance, allowing Eugeo to keep his momentum and use the skill «Meteor Break», to knock Bercouli into a nearby bath, where Eugeo had thrown the Blue Rose Sword. Upon retrieving it, Eugeo activated the Blue Rose Sword's second, recollection, phase of his «Armament Full Control» art for the first time, freezing them both, and having their Life drained rapidly, causing the the battle to end in a draw. Afterwards Eugeo revealed to Bercouli the history the Knight Commander had with the sword.

Trivia

 * Roses in UW are miraculous flowers that bear fruit with the most «Sacred Energy» and are not allowed to be planted by civilians, nobles or even emperors. Because of this, it's no wonder that such a rare and miraculous flower is being used as the sign of this Divine Instrument.
 * The Blue Rose Sword is thus far the only Divine Instrument that was created from two existences and by way of natural causes.
 * The Object ID of the sword is WLSS703 . This ID can be used for certain Sacred Arts rituals, for example, an item locating ritual.
 * Additionally, the first 4 characters of the Object ID are letters, "WLSS", and is speculated to mean "Double-Edged, Long Sword,  Long Sword, Single-hand," and the number, 703, represents the order this sword was created in.
 * However, in the Web Novel, the sword's Object ID was DI:WSM:0131.

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