Omega Frost
This is the Omega Frost, and it is shown in The Rebel Files.
The rumored Imperial project known as Omega Frost was said to be a superweapon. Despite the widespread stories about this weapon, Colonel Haxen Delto of the Rebel Alliance's High Command was of the opinion that this so-called "interstellar freeze ray" was simply a fabrication, a product of an Imperial disinformation strategy.
Sources
- Star Wars: The Rebel Files (The first time it was mentioned)
- The Star Wars Book (referred to as an interstellar freeze ray)