Noble Phantasms \
Heavenly Bladeworks -Magnificent Ocean of Swords-
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The Reality Marble of Shirou Emiya influenced by the legendary Japanese blacksmith Masamune. Inside of what was previously a wasteland of swords now exists an infinite ocean of pure waters, the surface of which glisten like crystals. Every sword not only forged but hypothesized by Masamune blooms from the waters as he approaches it.
The most reputed of these include:
Yawarakai-Te: It's name meaning "Tender Hands," it is the blade Masamune used in the famous river contest with his ambitious apprentice and rival Muramasa. It's hamon allows it to "restore" whatever it cuts, regardless of whether the damage was originally dealt by it. This effect cannot be used on Masamune himself.
Fudo Masamune: A blade blessed by the god it was dedicated to during its forging. Originally a tanto, it has been reforged into a massive sword with an extremely wide and curved blade, capable of chopping an automobile in half just by bringing it down. When its name is called, the blade will become engulfed with the Karura Flame, infusing it with the power to do enormous damage to beings with Divine properties. It has a dragon engraved on its blade.
Kotegiri Masamune: The "kote cutter" which Ushikage Asakura used to cut another samurai's yugote. Thanks to Nobunaga, the sword's length is significantly shorter than it originally was, thus Masamune forges both the original and shorter version and dual wields both at the same time. The swords were forged with a hamon that gives them a skill similar to [Protection Against Arrows], giving Masamune the ability to skillfully deflect and avoid most projectiles while wielding them.
Tarōsaku Masamune: A katana with a wider than average blade, and which stands taller than Masamune himself. While he can reforge almost any of his swords, Tarōsaku is the only sword which can be altered after already being forged. Specifically, it can extend the edge of its already lengthy blade up to nearly thirty meters. Its maximum length increases drastically inside Heavenly Bladeworks.
Nakatsukasa Masamune: A "ghost blade" that consumes magic. It can eat an impressive amount of spells up to B-rank in strength with relative ease, though its blade begins to crack after extended use. If hit by an A-rank spell it will shatter immediately, but inside of Heavenly Blade Works even A-rank spells can be consumed.
Honjo Masamune: Masamune's greatest work. It is by far his most famous sword, regarded as one of the most magnificent blades in Japan's history, though it is currently lost it. Out of all his works, it is the only blade Masamune himself considers worthy of the title "Holy Sword." Fittingly, it is also the only blade that cannot be forged outside of Heavenly Bladeworks. "Cutting" is this ability this blade's hamon has given it. Endurance does not matter. Armor does not matter. Skills, Noble Phantasms or any conceptual effect preventing something or someone from being cut does not matter. Unless the object in question is a Divine Construct, when Honjo Masamune cuts it, it will be severed as easily as a spring cherry blossom.