Dragonster

History
The Dragonster is a giant airship invented by Nebula, one of Wither's greatest allies. Also known as the Darkshadow, legend says that wherever the airship goes, it leaves empty lifeless patches on the ground. To refuel itself, it has to cut trees down and roast the wood in its furnace.

Physical Descriptions
The Dragonster usually appears as a giant mechanical bat when it flies. It was said that the airship transforms into a wingless mechanical dragon on the ground and a sea serpent in the water.