The Sword That Shouldn't Exist Direct

: They were crafted using crucible steel , a high-purity metal with a carbon content so high that the technology to create it wasn't thought to exist in Europe until the Industrial Revolution.

: Each authentic blade is marked with the name "+VLFBERHT+" in a specific arrangement of crosses, which functioned like a high-end brand name in the 9th to 11th centuries. Other "Swords That Shouldn't Exist"

: Players use the term for "illegal" legendary items like the Soulcatcher Blade , which summons hostile mobs to fight for the user, or "God Swords" with impossible enchantment levels (e.g., Sharpness 1000). The Sword That Shouldn't Exist

: It has been used to describe Sephiroth's Masamune in various media, highlighting its supernatural length and power.

: On collector forums like the Nihonto Message Board , it is often used for modern Chinese fakes that mimic Japanese signatures but lack the correct historical construction. : They were crafted using crucible steel ,

: Compared to typical iron or pattern-welded blades of the Viking Age, Ulfberht swords were incredibly strong, flexible, and sharp, allowing them to slice through mail armor without shattering.

The phrase is also popular in modern gaming and fiction to describe "illegal" or overpowered weapons: : It has been used to describe Sephiroth's

The phrase "The Sword That Shouldn't Exist" often refers to the legendary , a group of roughly 170 medieval Viking swords found in Europe. These weapons are considered historical anomalies because: