Sacred sword

The Sacred Swords are four legendary weapons in Sonic and the Black Knight. They are used to dull Excalibur's scabbard's power during the battle with King Arthur, and to form a barrier around the castle and Merlina's power. These swords are; Lancelot's Arondight, Gawain's Galatine, Percival's Lavietein, and Sonic's Caliburn/Excalibur

Arondight
Arondight is Lancelot's sword. Arondight is a dark-coloured sword, with a semi-serrated edge and a strange pattern near the point. It is wielded in Lancelot's backhand grip, and is taken from Sonic after their first fight. Strangely, when encontering Merlina in the cutscene before the Knight's Passage, Lancelot states "we have orders from out king. Have you any last words?" implying that he was going to kill her, despite being without a weapon.

Arondight is sometimes reffered to as the Sword of the Lake, due to Shadow being the Knight of the Lake.

Galatine
Galatine are Gawain's twin swords. The Galatine swords are deep red with a bright outer blade. The Galatine's being two swords is to complement Knuckles'/Gawain's close-quarters combat style. Strangely, Sonic is only shown taking one Galatine, yet when he places the swords around King Arthur, both of the swords are seen in a bit of a cross/X.

Galatine is/are sometimes reffered to as the Sword(s) of the Sun, as Gawain is the Knight of the Sun.

Lavietein
Lavietein is Percival's sword, a raiper. Lavietein is bright pink in colour, and is a very thin blade. Lavietein is the only sword besides Caliburn to be wielded normally; Arondight is wielded backhand, and Galatine are two swords.

Lavietein, like the others, is sometimes known as the Sword of the Grail, because Percival is the Knight of the Grail.

Caliburn
Main Article: Caliburn the Sword

Caliburn is Sonic's sword. Caliburn's hilt is a bronze colour, while most of the blade itself is white. Caliburn is hidden in a cliffside deep in Misty Lake, similar to the Sword in the Stone of Arthurian legends. Caliburn is the only sword wielded by Sonic, unlike the Knights of the Round Table which can forge different weapons.

Excalibur
''Main Article: Excalibur

Excalibur is essentially a super transformation of Caliburn. Unlike Caliburn, Excalibur is all gold, even holding a golden outer blade.