Fiction:Xorg

This started as a Grox traitor who hated the ways of the Grox. He invented the planet antibuster to reverse the effects of the planet buster, then later developed it into a device capable of creating planets and even star systems from scratch. In war, they often use stars they created to collide with enemy's stars. At high velocities, this causes a supernova equivalent of a Star Buster. It destroyed all stars except dense ones (white dwarfs and neutron stars) and all planets in the system. They are currently working on a Galaxy antibuster, capable of creating an entire galaxy. This technology utilizes photons released from billions of stars as energy, then colliding them to form matter. It takes a lot of energy, but since most empires are allies with this one, they donate energy when needed.