Fluxsteel Axe
The flux of the land runs through the steel: it digs faster in a chunk full of flux, slower in a dried-out one.
kinditemcreative tabFluxion
Currents
Alloy11
Lattice4
Gale3
Weave2
Root1In the Codex
Entry 
Fluxsteel Gear — Tools and armor of a steel the flux of the land runs through.
Where to get
Caches
Vaults of the Flooded Archive and Great Dam