The Paux Crystals
Blig'gran wants the Grellish Herds because they have access to a very rare material, Grell Crystals, before the end of the galactic rotation, which signals the end of his Presidency; but is having trouble taking it with his Ootlanine multiracial slave army because the Breed Guard are to powerful.
Themes:
Fighting for Peace, Greed begets destruction, Some things are not meant to be controlled