Excalibur's Scabbard

**Excalibur's Scabbard** (聖王剣の鞘, *Seiōken no Saya*) is an enchanted sheath created by the faeries that grants immortality onto whoever wielding it. It is currently sealed within the body of Shirou Yukihira.

## Summary

The Excalibur's Scabbard is a faerie-crafted artifact originally in the possession of Igraine, also known by the faeries as "Lady Arvyrne" of the Seelie Court. After she was tricked into marrying Gorlois de Bois, he gained the control of the sheath and used it to rise above the ranks and become one of Ambrosius Aurelianus' most trusted vassals, eventually becoming the Duke of Cornwall.

Despite this, Igraine detested her husband and started a secret relationship with Gorlois' close friend Uther Pendragon, even siring three bastard daughters with him and passed them off as her and Gorlois' trueborn daughters.

Because of her devotion to Uther that, during a conflict between Uther with a neighboring clan, she switched the scabbard with a fake one, thus resulting in Gorlois' death and her becoming Uther's new wife and Queen of Camelot.

After Uther's death, Igraine returned to Avalon with her daughters and the enchanted sheath. However, when her son Arthur claimed his birthright and became King of Camelot, she briefly returned and passed the sheath down to him.

Many years later, due to internal conflicts within House Pendragon, a civil war broke out that devastated the British Isles. To protect her son Mordred who led the rebellion against Arthur's reign, Arthur's older sister Morgause employed the same trick their mother did before and switched the enchanted sheath with a fake one, resulting in Arthur's death during the Battle of Camlann.

Not much is known about the enchanted sheath after Camelot fell up until the 12th century, when it was excavated by King Richard I in Cornwall. He then gifted it to House Ambrosius for safe-keeping, which they did until their extinction in the 16th century and the sheath went missing once more.

In 1978, the enchanted sheath was discovered, being sealed in an underground ruin beneath one of the Three Factions' former battlegrounds, by Kiyoko Saiba. As a wizard and a former member of the Shinra Clan, she recognized its power and switched the scabbard with a replica and secretly brought it back with her in Japan. Years later in 2003, after her grandson Shirou Yukihira got caught in a tragic accident that killed his mother, Kiyoko decided to seal the scabbard inside him as an attempt to save his life.

## Appearance

The Excalibur's Scabbard is a luxurious sword sheath made of pure gold and decorated with blue enamel that seems more like a treasure to show dignity and nobility like a crown or staff than an actual piece of equipment. An inscription written in Fairy Letters is engraved on its center to show that it is not a work that can be created by the hands of mankind.

## Abilities

The Excalibur's Scabbard bequeaths its user limited immortality through constant regeneration, as well as preventing the physical deterioration that comes with aging. It possesses potent Healing Magic, allowing for critical and fatal wounds to be rapidly healed to restore the user's health, with minor injuries being restored instantly and even larger missing portions of the body and destroyed vital organs like the heart can be quickly restored at the critical moment before death.

Targeting anything other than the user's head in order to destroy their brain is futile, requiring for a decisive strike to be landed in order to cause any true damage. It does have its limits in repairing the body, as counteracting curses and poisons take a great deal of time, not to mention that it couldn't restore the user's stamina or take away the pain they would feel from the opponent's attacks.

It also functions as an "absolute defense" that goes beyond defending or reflecting, as it can dissipates into countless tiny particles in the air and engulfs the user to become a "portable fortress", completely isolating its user in an alternate dimension completely separated from the regular world that shuts out all destructive interference from the outside world. According to Sirzechs, in order to break through the Bounded Field created by the sheath, it would require the opponent to perform a reality-shattering attack, which is something only gods or God-class beings can do.

## Limitations

The Excalibur's Scabbard will only reveal its true power to those who either carry King Arthur's bloodline or embody his ideas of justice. The current wielder/vessel, Shirou Yukihira, appears to qualify both categories, as he is descended from the Pendragon family through his father, who is a grandson of a Pendragon bastard, he also possesses a strong and unwavering sense of justice.

## Trivia

* It is rumored that Elaine, King Arthur's sister, was the one who hid it after he died.
* A copy of the fake scabbard Morgause used is displayed in London's Museum of Magical History.
* While it is known as Excalibur's sheath, it was created long before Excalibur did and was a shield before Gorlois had it reforged into a sheath after his marriage with Igraine.