The Xzylocksyan Plague

This is part of the DragonSoul continuity.

The Xzylocksyan Plague was engineered by Homeworld in 25428 A.M.D, as a more subtle way of eradicating the Xzylocksyans without causing direct conflict with The Intergalactic Police Force.

It killed 98% of all Xzylocksyans present on their home planet at the time.

This was the event that allowed Homeworld to send ships to Soiterra in preparation for The Great Ascension.