Legacy Weapon

The Legacy Weapons are weapons with special properties.

Information
They are similar to the Nox Nyctores, and seem to have side effects as the cost of usage.

Crystal Sealing Blade: Murakumo
Crystal Sealing Blade: Murakumo – A blue sword that resembles the blades of Lux Sanctus: Murakumo, only with a longer handle. It can easily destroy a Union's crystal in a single slash. The sword is sentient and has the ability to choose its owner. If it feels it cannot trust someone, no force in the universe will allow that person to wield it. There is no real information about any potential repercussions regarding its use. It appears to have changed into a long buster sword in BlazBlue: Centralfiction, meaning it's either been upgraded or is bearing a casing as the Murakumo's original form can be seen inside it.

Sword of Destruction: Kusanagi
Sword of Destruction: Kusanagi – Also known as the God-Killing Sword, it requires a level of magical power that few people possess, and generally cannot be used for any extended time. Kusanagi is comprised of four paired red and black swords that resemble the blades of Lux Sanctus: Murakumo, and only Sechs' mastery of gravity-based sorcery allows him to utilize it to its fullest. Can undo any kind of intervention, including the power of god, Phenomenon Intervention. In the hands of someone as powerful as Sechs, it can also manipulate the space/time continuum, allowing small changes to reality to be made. Its price is "Shared Existence", which means that the wielder will be the sum of all timelines, for example, if the user sustains a wound from one timeline, it will be present in another.

Sealed Spear: Izayoi
Sealed Spear: Izayoi – A spear with two shields hovering around it. It bears eyes on the swords and shields. It allows the user to seal the sorcery of the attacked target, turning any sorcerer into a normal person. When Izayoi is activated, a special barrier is laid and seals the one pierced by the spear inside the barrier. Its price is blindness.

Gallia Sphyra: Outseal
Gallia Sphyra: Outseal is a spear of Mai Natsume, obtained by her in BlazBlue: Variable Heart.

Outseal is a replica of a Legacy Weapon, but according to Kajun Faycott, its power is equal to the original.

This spear removed the sense of pain from Mai, and also taught her to wield it properly. In addition, it possesses the power to change direction mid-flight after being thrown and home into its target. Its price, if the replicas have any, is unknown. Легаси Вэпон