The primals were most likely not in the ship in the opening cs. they were brought into hydalin by the resulting crash and explosion. That's why the imps are so head strong on wiping them and there followers out, they feel responsible for bringing the blight of there existence and there war for dominance to the world.


Cerulium is as far as i can tell not a cocktail of juiced crystals its something totally different. Its the unobtainum powering the war machine that is the empire. The reason there harvesting crystals on mass is most likely to call forth there own primal. Perhaps they realize that if the primals stop there in fighting and focus on them there toast. and are attempting to fight fire with fire.