What is The Ethersea...
It was one of the big questions when the Idoneth Deepkin were first introduced... how can they fly. GW has responded to this already, but to follow it up... here is an image that they released today that is just great artwork, and a little blurb about the Ethersea.
via Age of the Sigmar on Facebook.
https://www.facebook.com/GWWarhammerAgeofSigmar