Here you will find SLPs for a flying ship with what looks like a balloon giving it the ability to fly. The SLP for the ship has one frame per angle and also comes with a Shadow SLP. It could be used for a fantasy or steampunk style scenario. Get creative with it.
you have to download advancedGenieEditor3 and : ((Drs editor,Slp Editor and Animation Preview which you can find it all 3 in one)) there is some tutorial for how to add custom unit just search like : " age of empires 2 create your own unit " & etc