The legendary blade wielded by King Arthur, said to have magical properties or represent a king's right to rule over all of Great Britain. In some versions the sword in the stone and Excalibur are the same thing but in most they are separate. The Lady in the Lake is the one who gives Arthur the sword in the versions where it is not the sword in the stone. The attributes of Excalibur include words engraved don opposite sides of the blade, a scabbard that will prevent death by wounds or not bleed at all, and the power to create a light that blinds his enemies when he pulls the sword from the stone.
Excalibur is a weapon for Tatsuya Suou, obtained by returning Arthur at max rank.
Persona Q: Shadow of the Labyrinth
Due to an error on the localization team's part, in the English version there is a second weapon named "Aroundight", however the description specifies that it is supposed to be the Excalibur.
Devil Children Black Book/Red Book (PS)
Excalibur is earned by beating Arthur in Battle Net.
DemiKids Light/Dark & Devil Children Fire/Ice Book
Excalibur is an item used in Power Fusion and passes on the skill Anti-Good.