The asymmetrical starship flown by the rogue Borg who follow the android Lore, which raids Federation outposts through transwarp conduits in Descent and is destroyed by the Enterprise-D under Dr Crusher.
Lore's ship is the Borg vessel seen in the two-part Star Trek: The Next Generation story Descent. Unlike the cubes met before, it is an irregular, lopsided design. Its crew are Borg who were cut off from the Collective after the return of the drone Hugh and who have taken Data's brother Lore as their leader.
In 2369 the ship attacks the outpost at Ohniaka III and then a colony, each time escaping through a transwarp conduit. The Enterprise-D follows it through a conduit to a distant planet where Lore has his base, and most of the crew beam down to search for Data.
With the senior officers on the surface, Dr Beverly Crusher is left in command. In Descent, Part II she takes the Enterprise into the star's corona behind an experimental metaphasic shield, and Ensign Taitt suggests triggering a solar eruption, which destroys the Borg ship.