Caliburn is a specialized skill in the Fate/Stay Night visual novel and anime series that refers to the ability to control and wield the mythical sword Excalibur, which is said to be the most powerful weapon in the world. The skill is possessed by the protagonist, Shirou Emiya, and is considered to be a rare and powerful ability. In the story, Caliburn allows Shirou to unleash Excalibur's full potential and use it to defeat powerful enemies.
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