Sphere 634

Sphere 634 was Borg sphere during the 24th century.During Voyager's attempt to get home in 2377, Voyager was chased by this Borg sphere,one of the few the Borg Queen had managed to keep in contact with. The sphere managed to weaken Voyager inside the collapsing transwarp corridors before capturing the ship.When the sphere arrived in the Alpha Quadrant, a fleet of 27 Federation starships opened fire on the sphere. It took a transphasic torpedo fired from Voyager to defeat it. (VOY: "Endgame")