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« Spiral, ready!"
"Let me show you the true rainbow..."
"Caladbolg! »


Caladbolg: The Rainbow Sword (虹霓剣カラドボルグ, Kōgei-kenKaradoborugu?) is the magic sword of Fergus mac Róich.[1][3] Also given the appellations of Spiral Rainbow Sword (螺旋虹霓剣, Rasen Kōgei-ken?) and Spiral Sword (螺旋剣, Rasen-ken?), it is a high-power and wide-range attack that makes even destruction of the landscape possible.[1] It is the natural enemy of Cú Chulainn due to him having a geas that makes it his duty to be defeated once by the sword so long as it is wielded by someone who is Ulster-born.[3] It is the prototype of many magic and holy swords of later ages, including Excalibur Galatine, and thought to be the same sword as Caledfwlch from Welsh Mythology, possibly making it the prototype of Excalibur as well.[1][3][4] The sword changes appearance as Saber goes through Ascension, becoming more drill-like.

It is noted in legends that it activates as a sword of a light, unleashing a "sword-shimmer" that "stretches from the magic sword like a rainbow", allowing it to cleanly slice off the top of hills at full power.[1][4] He used it as such when taking out his rage at being unable to take his revenge, showing its fearsome power by slicing through the tops of three hills.[1][3] Despite such usage, its true aspects when wielded as a Noble Phantasm are more pronounced towards landscape destruction. Described as a "no-questions-asked great attack that breaks the earth", the Heaven and Earth Sky Great Rotation, he plunges it into the earth and causes a great eruption around the enemy.[1]


Caledfwlch CaladbolgEdit

Caledfwlch Caladbolg: The Ultimate Rainbow Sword (極・虹霓剣カレドヴールフ・カラドボルグ, Goku Kōgei KenKaredovūrufu Karadoborugu?) is a variation used by Fergus mac Róich in his child form.

Caladbolg IIEdit

Caladbolg II: The Fake Spiral Sword (偽・螺旋剣カラドボルグⅡ, Gi Rasen-kenKaradoborugu Ⅱ?, localized as "Fake Helix Sword") is a modified version of the original Caladbolg using Reinforcement.[3] Archer encountered the original sword at some point during his life, adding it to the numerous Noble Phantasms stored in Unlimited Blade Works and allowing him to modify it to improve its function as an arrow and suit his fighting style.[3] He projects it to be used as an arrow rather than a sword, with the improvements aimed to make use of it as an A-rank Broken Phantasm. He chants the first line of Unlimited Blade Works' incantation before firing it and, despite being renamed with the "II", he still only chants "Caladbolg" to activate it. When utilized as a close-combat weapon, he thrusts it to pierce his opponent.

The blade of the sword coils into a spiral that can penetrate any target by creating a twisting distortion in space when fired. When fired at Caster, it is powerful enough to easily break through her magical defenses simply as an aftereffect of it being purposely fired at an area far away from her. Shirou believes that, even if she had tried to teleport away from the attack, she would have simply been twisted along with the space as well. After being intercepted by Berserker, it creates a large explosion capable of razing a cemetery and engulfing it in flames.

  • Archer preparing to fire Caladbolg II
  • Caladbolg II being fired as an arrow
  • The spiraling trail left behind after Caladbolg II is fired
  • Caladbolg II against Caster
  • Caladbolg II razing a cemetery after being deflected

Caladbolg IIIEdit

Caladbolg III: The Fake-Fake Spiral Sword (偽・偽・螺旋剣カラドボルグⅡ, Gi Gi Rasen-kenKaradoborugu Ⅲ?) is a deteriorated version of Caladbolg II utilized by Chloe von Einzbern. Releasing its True Name strengthens it and allows it to pierce everything by twisting space.[5]

Fergus My Love Edit

Fergus My Love: My Dear Rainbow Sword (愛しき人の虹霓剣フェルグス・マイ・ラブ, Itoshiki Hito no Kōgei-kenFerugusu Mai Rabu?) is one of Medb's Noble Phantasms where she temporarily summons the magic sword Caladbolg, the Noble Phantasm of Fergus mac Róich. With a lovely swing, she releases the sword of a rainbow-like light, the Heaven and Earth Sky Great Rotation, as a ranged attack.[6]


Hirokazu Koyama is the weapon designer for Caladbolg II.

Gilgamesh is shown using Caladbolg from the Gate of Babylon on Lancer in the Fate route of the Fate/stay night anime, but it uses the design of Caladbolg II due to being developed before the original Caladbolg appeared in Fate/Grand Order.


  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7
  2. Fate/Grand Order material II - Fergus Profile
  3. 3.0 3.1 3.2 3.3 3.4 3.5
  4. 4.0 4.1
  5. Fate/Grand Order material III - Medb, p.234-243

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