Dux is the forth boss found at Chapter 4 of Astebreed.
Background[]
Dux is Filune's largest gravity control system as well as the Mobile Planet's central machinery. Designated 'duke', Dux contro
ls the whole of the Mobile Planet by coordinating the large amounts of energy provided from bypasses. Dux is important enough to have Cannon, Portal, and Shell as guard functions. At the height of the second attack against the Mobile Planet, Asymptote Esto fused with Dux and utilized the Mobile Planet's energy to evolve into Asymptote Void.