Also known as Sword of biting gales. It's a main weapon for Jaster. Tips about the blueprint can be obtained from Lugei and Yorkman. Lugei is at Vedan: Myna - inside the weapon shop of Kayo. Yorkman is at Rosa: Salgin Residential Area/Plaza - inside Mohandis shop. Once manufactured this item can be bought from Mohandis. The earliest time you can develop this sword is by chapter 8, but if you don't have a Chameleon Particulate from an Assault Walker drop or from a Cancer King's Ruins chest, you'll have to wait until chapter 10 to buy it from Bivine.