What sword does the fairy sword in ancient books refer to?

This Excalibur was cast in Longyang, Jiang Guo. After Jiang Guo's national subjugation, the whereabouts of the magic sword was unknown, and the rumor was brought to Butoushan (there is a plot in Fairy 4), and the magic sword entered the hands of Murong Ziying. Later, Murong Ziying put the magic sword back to Jiang Guo Casting Jiange (Sword Tomb). (Personally, Murong Ziying kept the magic sword in the sword grave, and he was always worried before he left, fearing that the magic sword would fall into the wrong hands and set a firm but gentle attitude around it). Later, the Forbidden City in Jiang Guo was preserved by later generations. Numerous sword-snatchers, among whom Fairy Spirit 3 is famous-Kyushu Sanren (Sword Pool) wrote a message on the wall of the casting sword pavilion in Jiang Guo, "I have been good at sword all my life, seeking for it, collecting it and casting it, and it has been more than fifty years. When I meet Xianyuan today, I will know that Xianjia is really a sword and an invisible shock wave. The sword of gold and iron is easy to break because of its sharpness, and the sword of essence comes from heaven and earth and never dies. And a hundred years of life, it is difficult to bring back dust by collecting thousands of dollars; The sword in the box is equivalent to rotten wood and mud; Remembering my folly for half a lifetime, I made magic dust and lived up to my sword. Take this opportunity to spread swords in the rivers and lakes; Seal this place as a sword tomb and return the Forbidden City to our ancestors. Since then, I have retired from Xianshan, pursued truth with swordsmanship, and visited the right path. -Kyushu scattered people ",found that Kyushu scattered people may be defeated by Murong Ziying's firm but gentle, and realized that" today, when we met the fairy, we can know that the real sword of the fairy family is invisible but firm but gentle "), then the magic sword reappeared on the earth, disturbed the world with ghost power, was locked at the top of the demon tower by the three generations of leaders of Shushan, and was later taken out by the magic statue and presented to Jing Tian (the reincarnation of Fei Tianpeng). Note: as for the length and weight of the sword you mentioned, it seems that there is no record in the game or TV series at all, so it is impossible to verify it! ! 》