The Pfhor had previously been forced to use the trih xeem when the Nakh (the last extant client race of the Jjaro) rebelled six thousand years before the end of Marathon 2, as well as a rebellion by the Drinniol.
The Pfhor have a weapon they save for slave revolts; a weapon which even they hesitate to use in the ordinary conduct of war. In the language of the Jjaro who conceived and built the device, it is called the trih xeem; a fair English translation would be "early nova".
There is not a single Nakh alive today, and if you look for their stars, you will only find ever-expanding clouds of superheated gas and dust light-years in diameter.
The evacuation of Lh'owon has already begun. In a matter of hours this planet will be a thin shell of plasma riding the shockwave of its exploding star.
You can stay behind to work on your tan, if you'd like, but I'm leaving.