History of Cabal Thresher

The Cabal Thresher is a Cabal ship that flies in to attack during the Cabal Excavation public event. It arrives when the Overriding Lander reaches about 30 to 40 percent progress and makes two passes before leaving, so there are two chances to shoot it down.

Destroying the Thresher turns the event heroic. A boss, Excavation Valus, then appears to complete it.