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The Holy Sword (聖剣, Seiken), also called Excalibur (エクスカリバー, Ekusukaribā) and the Legendary Sword, is the powerful legendary and mystical weapon transformation of the Great Old One known as Excalibur. According to Franken Stein, it is the strongest weapon in the world.[1]


In his fully transformed state, Excalibur assumes the form of a radiant golden broadsword (or arming sword), comprising of an unblemished double-edged blade and a precisely ornamented cruciform-shaped hilt, engraved with various regal inscriptions along both its guard and pommel.[2]


The very presence of this blade makes the air in the immediate vicinity vibrate and when its considerable powers are initially invoked, the surrounding area is bathed in a brilliant dazzling light.[3] Enamored with strong, magical power[4], its wielders grow Wings of Light and gain the ability of instantaneous teleportation. In addition, each swing slices through the air.[5] The weapon is able to resonate with anyone and everyone, provided they're capable of bearing the obnoxious personality of Excalibur himself.[3]


  • It is generally thought that only heroes and those worthy would be able to draw and use the Holy Sword. Such a fact, however, is actually untrue.[3]
  • It was the weapon transformation capabilities that brought forth the inspiration for the Demon Weapons. However, the Holy Sword is unable to eat the souls of others like the Demon Weapons can.[6]
  • "The Holy Sword" is also the title to Chapter 60 of Fire Brigade of Flames, Atsushi Ōkubo's series that he began after completion of Soul Eater NOT!


  1. (Yen Press) Soul Eater Manga: Chapter 8 — Stein: It's the strongest weapon in the world.
  2. Soul Eater Anime: Episode 8
  3. 3.0 3.1 3.2 Soul Eater Manga: Chapter 8
  4. Soul Eater: How to Make a Death Scythe Guidebook
  5. (Yen Press) Soul Eater Manga: Chapter 8 — Stein:The one of carries it grows Wings of Light and gains the ability to teleport instantly. And each swing of the sword slices through the air!!
  6. Soul Eater Manga: Chapter 98