Legacy Weapons are a set of powerful weapons created in an age long past to combat a threat to humanity.
The Legacy Weapons are OOPARTS that have been excavated by humans. With the exception of Gallia Sphyras: Outseal (which is a replica made by Kokonoe and Kajun Faycott) they were made by long lost technology. They all have incredible power, on par with the Nox Nyctores that were based on them, but have a cost for using them.
- Signati Gladio Crystalis: Murakumo - active. Previously owned by the Mitsurugi Agency, Touya Kagari. Currently owned by Es.
- Sealed Spear: Izayoi - unknown. Previously owned by the Magic Guild, Kuon Glamred Stroheim.
- Sword of Destruction: Kusanagi - presumed lost in the Boundary. Previously owned by the Magic Guild, Sechs.
- Gallia Sphyras: Outseal - active. Currently owned by Mai Natsume.
The name given to all weapons uncovered through extensive excavation of ancient ruins of unknown origins. Also known by the acronym OOPARTS. 
- BlazBlue: Variable Heart, Chapter 6
- XBlaze Code: Embryo, TIPS