Fiction:The Xylar Warlords

The Xylar were born just about the same as the grox were, but now they've grown powerful, even the grox on the outside of their 'Blockade' fears them, the Xylar have destroyed more than 10 planets in one week, now they are locked in total all-out war with the Grox.

The Xylar have tested some anti-planet missiles [empires may call them Planet Busters] on at least 3 grox systems. The Xylar have a bad relationship with the grox, even worse than them and humanity [which is about 300] so if you want them to help the grox, your dead.

The Grox have been able to adapt to the Xylar's planet busters, but not anyone else's in the galaxy, so the Grox have been safe long enough to build a bigger blockade. Some Xylar have allied the grox. They are known as the Xylar Rebellion.