Borg Pyramid
The Borg Pyramid is the designation given to a specific Borg starship by Starfleet after it was first seen by the USS Boudicca and the USS Rosenante in early 2414.
The Vessel was in orbit around the planet Dovek II located in the Beta Quadrant near both Federation and Romulan space. The ship was significantly smaller that the accompanying Borg Tactical Cube that was also present.
The ship proved to have a massive energy beam on it's base. This beam was being used to scour away the surface of the planet, meter-by-meter. As the planet was not inhabited, it was unclear at the time why the vessel was performing such an act, although it later became apparent that the vessel was conducting an archeological survey, alongside Borg Drones on the planet's surface.
The Borg Pyramid was first seen in the USS Boudicca and USS Rosenante joint mission Once More Into The Breach