Ikukube

The Ikukube was a dreadnought used by Tholian Assembly space forces in the early 25th century. 

History
In the year 2409, the Ikukube led separate Tholian raids on Starfleet and Klingon Defense Force starbases in the Aldebaran Sector. It was destroyed when it entered the system as part of the ninth and final wave of attackers.