User blog comment:Merkarion/End of the Great War/@comment-31137559-20181025183305/@comment-28884330-20181026221909

“Even though there are numerous holy-swords originating from all over the world, I still think the most famous one would be Excalibur. Even in Japan, it comes up in many books. It’s a holy weapon that is created through means of magic and alchemy by those who reach the territory of God. But holy-swords choose their wielders. I hear that only one person in a decade or so gets chosen.”

From Volume 3. There's no mention of any being made by the God of the Bible.