Unlimited Blade Works: Infinite Creation of Swords (無限の剣製アンリミテッドブレイドワークス, Mugen no KenseiAnrimiteddo Bureido Wākusu?, localized as "Universe of Endless Blades") is the Reality Marble of Shirou Emiya and the Noble Phantasm of the Heroic Spirit EMIYA and his Fate/Extra counterpart. EMIYA does not have a true Noble Phantasm that is the crystallized embodiment of a hero's existence like many demonic or holy swords, but if a Noble Phantasm is considered to be a symbol of the Heroic Spirit, then the Reality Marble is his Noble Phantasm. It is a high-class thaumaturgy that embodies their internal worlds and imprints them upon the World as a Bounded Field for a short amount of time. It is their one true specialization of magecraft, the result of "Sword" being both their Origin and their Elemental