A Borg pyramid was a type of Borg vessel used during the 23rd and 24th centuries. Little is known about them; however they are roughly as powerful as a Borg cube. The only documented encounter with one of these vessels was in 2269 when one of the ships attacked a Federation colony on Primus IV and subsequently attacked the USS Enterprise. The ship vanished after intervention from Onabi. (Star Trek: Phase II: "Come What May")