Procyx

It was called Procyx by the ancient, Elder race of Mhyrn. It meant, simply, The End Star. Procyx appeared in Mhyrn's skies near the edge of the galaxy, just as Mhyrnian scripture had foretold. To scientists it was merely a fascinating anomaly, for it appeared to be a star that shone in one, spectral color--a single frequency of light--pure blue.
But then nearby worlds began to crumble or blast into fiery deaths while their suns exploded or snuffed out in a dreadful finality called Hypermotility. The Mhyrnians had predicted this too. Their mythology claimed that Procyx might spell not only the end of every star and planet in the galaxy, but an inescapable doom for the entire universe.
Humanity's only hope lay in the Vanguards, mythical vessels of irresistible power. Yet it seemed these wondrous ships of light were only myths. Meanwhile, centuries passed. More and more star systems died and nothing could be done to stop the spread of Procyx's cancerous ruin . . .