Clarent

is Mordred's sword and Noble Phantasm, originally stored away by Artoria Pendragon in the armory of Camelot. Described as "more dazzling than any silver", it is an ornate, sparkling white silver sword adorned with splendid decorations, acting as a symbol of kingship denoting the right of succession of the throne. It is a treasured sword that has worth equal to, if not exceeding, Caliburn, that amplifies the authority of the king. It thus raises the owner's physical parameters by one rank and grants and raises the rank of the Skill Charisma.
It is normally a B-rank sword bestowed during the succession of kingship, but Mordred stole it without acknowledgement. She obtained it by breaking into the vaults of Camelot upon temporarily claiming the throne during her rebellion after inciting the incidents that drove her father to lead an expedition after the traitorous Lancelot.Fate/Apocrypha - Volume 3 Due to this action, she was never acknowledged as a king, so the rank of the sword is lowered by one rank to C and does not grant her any of the normal bonuses while she wields it. She still came to favor utilizing it due to it being a sword that symbolizes royalty and can still utilize its ability of amplification. As an application of Mana Burst, she is able to drive her excessive hatred into the sword and amplify it to utilize Clarent Blood Arthur. Mordred feels the weapon possesses a "curse‐like glory", not allowing herself to be defeated by anyone who is not her father, and even more so, not permitting for the sword that delivered a fatal blow to her father to fail in killing an opponent.
In Fate/Prototype: Fragments of Sky Silver, it is revealed that the sword Florent, wielded by Lucius Tiberius, is a brother sword to Clarent. It is also said to indicate the King's rule over Gallia in contrast to Florent indicating the Emperor's rule over all the people of the continent.Fate/Prototype: Fragments of Blue and Silver Act 3 part 2 translated by PhoenixRising on Beast's Lair.
==Clarent Blood Arthur==
 is the full power, released form of Clarent utilized by Mordred, a transformation into an evil sword of hatred upon the condition of her holding it.Fate/Apocrypha - Volume 2 It is not a property of the sword itself, but a manifestation of the episode in Mordred's legend where she had stolen the sword from King Arthur's armory and then later used it to deal a fatal blow to her father. The attack is achieved by Mordred combining Mana Burst with Clarent's ability to amplify magical energy and her hate for her father, manifesting red lightning that she directs at her enemy. Compared to the pride felt by other Heroic Spirits, it being crowned with the name of her father makes it more akin to a grudge in Mordred's case.Fate/Apocrypha - Volume 1 Should she make peace with her discord towards her father, even one-sidedly as in the Great Holy Grail War, she can still launch the attack regardless of her feelings towards her father as an innate talent inherited from the blood of the King of Knights.
Upon utilizing it, she takes a stance while removing her helmet, Secret of Pedigree, due to the requirement of it being released before she can use the attack. The space around her and the sword becomes stained with dark red blood, and the blade of the sword, enveloped by the radiance of blood, gives off strange, violent and furious sounds and begins to transform. Changing from Clarent's normally pure and beautiful form, her great hatred transfigures the sword into a sinister and wicked blade befitting a demon. Upon raising the sword, she releases the blood radiance upon the enemy as a flash of light, a surging wave with the simple purpose of destruction. It releases a straight line of crimson lightning from the tip of her sword, destroying all in its path. Utilizing it takes a great deal of energy, giving her intense pain throughout her body, but her Master's competency allows her the strength to move immediately after utilizing it.
==References==
vi:Clarent
Category:Noble Phantasms
Category:Anti-Unit Noble Phantasms
Category:C rank Noble Phantasms
Category:B rank Noble Phantasms
Category:Swords
Category:Noble Phantasms introduced in Fate/Apocrypha
Category:Noble Phantasms of Artoria Pendragon
Category:Noble Phantasms of Mordred