The Borg fusion cube was a type of starship operated by the Borg Collective in the late 24th century. Fusion cubes were made by fusing together eight standard Borg cubes. The Borg could similarly fuse eight tactical cubes together to create a Tactical fusion cube. To build either type of fusion cube the Borg had first to have built a fusion hub within the local area of space they were operating. Once the hub was developed the Collective could then select eight cubes which would place themselves in a careful formation and fuse.