Myoujingiri Muramasa

is a sword forged by Senji Muramasa. Though he claims it to be a failure because he accidentally smithed it into, he undoubtedly refers to it as his finest katana that reached the conceptual realm of Demon, becoming a Cursed Sword in the process. 
A single strike of this sword can cleave through the supernatural, on a Conceptual level. Myoujingiri Muramasa can cut through armor, boulders, and even steel, but it is not something that a normal human can use. When wielded by skilled sword users such as Musashi, it is able to reach the Spiritual Core of powerful Heroic Spirit Swordmasters such as Lancer of Purgatorio in the Ether, destroying them in the process. 
Musashi claims its whole structure and form made it feel much lighter than a feather when swung around and it has a whole new level of Divinity within it, however, it's a Glass Cannon, that'd cut both the victim and the user. The katana is still imperfect as it can't really cut off anyone from fate or destiny but it can at least sever a cause.Fate/Grand Order: Epic of Remnant Shimosa: Section 3 Prima Cantica: Purgatorio (Ending)  
==References==
Category:Swords
Category:Conceptual Weapons
Category:Terminology in Fate/Grand Order
Category:Miyamoto Musashi (topic)