Revolving Blade Sword

The Revolving Blade Sword (廻転刃刀, Kaiten Yaibatou) is a superheated rotating blade capable of slashing through the metal of most Knightmares. This weapon was invented by Rakshata Chawla as a Japanese equivalent and answer to Britannia's experimental Maser Vibration Sword. The sword is constructed similarly to a chainsaw, wherein small blades (also known as teeth) circulate around the length of the blade; the main difference is that heat is used to further the effectiveness of the sword, making it even more deadly. However, it appears that the Revolving Blade Sword is ineffective on heavily armored Knightmares, such as the Mordred, which withstood a direct hit from it without a scratch.

Background
Revolving Blade Swords were originally used only by the Four Holy Swords and Kyoshiro Tohdoh. The weapon made its debut in the Battle of Narita, utilized by the Holy Swords' Burai Kai units. Later, it was equipped to the Gekkas the Holy Swords received. Soon, it became standard equipment for all The Black Knights' commanders in the hands of the Akatsuki Command Model Zikisan. Tohdoh, however, abandoned the Revolving Blade Sword in favor of a variant known as the "Brake Sword" which has only been used by his personal Knightmares: Kyoshiro Tohdoh's Gekka and the Zangetsu. The Brake Sword is similar to a Revolving Blade Sword, but differs as it has thrusters to allow the changing of its movements or Tohdoh's Knightmare itself. It also has a single Slash Harken attached to its pommel. There are also simplified versions of the Blade Sword which unfold and are shaped more like batons with a blade extending from the top, which was used by the standard Knightmare of the Black Knights, the Akatsuki Mass-Production Model.