Caliburn (カリバーン, Karibān) is the sword that King Arthur pulled from the stone to become king. While she wielded it for many years and favors it above all other swords, it was destroyed in a battle where she broke the rules of chivalry, and replaced by the more famous Excalibur.
Powers and Stats
Tier: At least 7-B to at least 7-A. High 7-A with blast
Name: Caliburn: Golden Sword of the Victorious
Origin: Fate/stay night
Classification: Noble Phantasm
Powers and Abilities: Energy Projection
Attack Potency: At least City level (Dependent on the strength of its wielder) to at least Mountain level (Was able to cut into Berserker's body, slicing through God Hand). Large Mountain level with blast (By releasing its True Name, it showcases an output of light on the same scale of Excalibur, though weaker, killing Berserker seven times over).
Speed: None, Hypersonic+ to High Hypersonic with blast
Durability: At least Mountain level (Can withstand the force behind its swings, but would likely be destroyed by a release on Excalibur's level).
Range: Extended melee range, Kilometers with blast.
Weaknesses: It is not as strong of a sword as Excalibur and releasing its True Name will likely destroy it.