Excalibur
Geoffrey of Monmouth, in his "Historia Regum Britanniae" ("The History of the Kings of Britain", c. 1136), Latinised the name of Arthur's sword as "Caliburnus" (potentially influenced by the Medieval Latin spelling "calibs" of Classical Latin "chalybs", from Greek "chályps" ["χάλυψ"] "steel"). Most Celticists consider Geoffrey's "Caliburnus" to be derivative of a lost Old Welsh text in which "bwlch" (Old Welsh "bulc[h]") had not yet been lenited to "fwlch" (Middle Welsh "vwlch" or "uwlch"). In the late 15th/early 16th-century Middle Cornish play "Beunans Ke", Arthur's sword is called "Calesvol", which is etymologically an exact Middle Cornish cognate of the Welsh "Caledfwlch". It is unclear if the name was borrowed from the Welsh (if so, it must have been an early loan, for phonological reasons), or represents an early, pan-Brittonic traditional name for Arthur's sword.
The Extraordinary Adventures of Alfred Kropp
There he is contacted by Mogart who tells him he has kidnapped Natalia and will kill her unless Alfred brings him Excalibur. Alfred personally travels to the location indicated by Mogart, which turns out to be Merlin's cave in England in order to save Bennacio's daughter. Here, in Merlin's Cave in Tintagel, Alfred finds Mike again and forces him to lead him to Mogart but decides to spare his life, only knocking him out. Then he meets Mogart again and hands over Excalibur but Mogart betrays him again and stabs Natalia before attacking him with Excalibur. Once again, Mogart has the upper hand thanks to Excalibur. He disarms Alfred who reveals to him he is the heir of Lancelot, the son of Bernard Samson who Mogart loathes. Hearing this, Mogart flies into a rage and impales Alfred, pinning him to the wall of the cave, while telling him how he tortured Samson until he could no longer beg for his life, then beheaded him and fed his head to the crows in Jativa. Alfred dies and has a vision of a lady in a garden. Then he finds his true destiny as the master of the Sword. As in the original King Arthur stories, Mogart is unable to pull the sword out of the stone as only the Master of the Sword can claim it. Kropp, having revived, pulls the sword out of the stone, beheads Mogart, heals Natalia with his blood (since he was wounded by Excalibur) and returns home as a hero. At the end of the story, Alfred finds that he yearns for more excitement and calls OIPEP, wanting a job fighting "agents of darkness."