Imperial Leviathan
The Imperial Leviathan is an existing mobile factory from Legends.[1]
In 5 ABY, multiple Imperial Leviathans were stationed in the Thomork system, where Umak Leth rebuilt one of them into the first prototype of a World Devastator on the basis of plans dreamed up by Triclops. When the first test was successful, Leth dispatched the remaining Leviathans to Byss alongside the prototype World Devastator.[2]