Arondight: The Unfading Light of the Lake (無毀なる湖光, Mukinaru Koukō?) is a holy sword wielded by Lancelot that is the counterpart of King Arthur's Excalibur. It bears a similar design to that of Excalibur, carved with Fairy Letters to show that it was a Divine Construct not forged by mortal hands. It is a limitless sword capable of receiving any attack without taking damage that shines much like the water of the Lake. It was given only to someone who could be exalted as the "perfect knight", the strongest, bravest and truest knight of an era, which signifies the unrivaled Lancelot out of all those who sat at the Round Table of Camelot. The sword has lost its status as a holy sword after Lancelot used it to slay several of his fellow knights who were acting as guards for the execution of Guinevere. His magical energy, filled with his madness and resentment, has dyed the sword pitch-black and caused it to fall to the state of a demonic sword of a mad warrior. It is Lancelot's true Noble Phantasm, which seals For Someone's Glory and Knight of Owner once it is drawn. It increases all of his parameters by one rank and the success rate of saving throws are doubled. Due to the legend in which Lancelot slew a dragon, Arondight deals additional damage to Heroic Spirits like Saber who have a "dragon" attribute.
Arondight - OverloadEdit
English | Japanese
"Reaching the very end, beyond the boundaries. King on the other side, look at this light!"
"Arondight - Overload!!”
Arondight - Overload: Breaking All Restraints - Overloaded Light of the Lake (縛鎖全断・過重湖光, Baku kusari zen dan kajū Koukō?) is the Noble Phantasm of Lancelot. Lancelot bestows an overload to the Unbreakable Lake Light, letting the charged magical energy leak out. It is then re-purposed into an attack. This Noble Phantasm is something close to a sword skill, which deliberately refrains from emitting the mana as a slash of light, instead releasing it upon cutting at the target. The blue light of the vast magical energy that overflows from the severed section has been alluded as like a lake.
- ↑ 1.0 1.1 1.2 1.3
 Fate/Zero material - Servant Status: Berserker, p.024-025
 Fate/Zero - Volume 4: The Unfading Light of the Lake
 Fate/Zero material - Weapons: Arondight, p.125
- ↑ 4.0 4.1 4.2 Fate/Grand Order Profile of Lancelot (Saber), translated by Master of Chaos at Beast's Lair.