Miike Tenta Mitsuyo

is the sword of Amakusa Shirou Tokisada, formerly the favored blade of a "certain one-eyed master swordsman." While normally just a simple armament summoned with Shirou, William Shakespeare's Enchant Skill is able to render it as a C-rank Noble Phantasm. 
Due to it being an "incredibly famous sword", Caster was able to make it of much higher quality than other objects, using his writing prowess to describe how the blade is "magnificently sharp" and the amount of blood that had stained it in its lifetime to great effect. It is a Japanese sword with an iron scabbard, sharing the traditional shape but also carrying "various aspects" imbued by the soul of the swordsmith. Compared to "beautiful and lovely blades that possess a shine worthy of being called works of art", the sword is a "broadminded and deadly blade" that "specializes in cutting something." It is a first-rate sword, acknowledged as such by even Servants with their wide-ranging perspectives on all kinds of weapons.Fate/Apocrypha Volume 2: Round Dance of Black / Festival of Red - Chapter 2 It carries the Magical Energy normally found in Noble Phantasms, and it allows him to damage Frankenstein and receive her blows without at all damaging the sword.Fate/Apocrypha Volume 2: Round Dance of Black / Festival of Red - Chapter 3
==References==
vi:
Category:Noble Phantasms
Category:C rank Noble Phantasms
Category:Swords
Category:Unclassified Noble Phantasms
Category:Noble Phantasms introduced in Fate/Apocrypha
Category:Servant equipment
Category:Noble Phantasms of Amakusa Shirou Tokisada