Morek and Libero will have big decisions on their hands. Libero's a vassal of Niselur, and it'd make little sense for them to pay thousands of gold to be a vassal and not obey. However, the context is maybe different than they first thought... I have no idea what went on in their minds, but if they were giving gold to Niselur simply to fend off a perceived impending Morekian invasion, this is quite something else. Niselur would never be able to do anything to protect Libero if it's fighting Astrum, leaving Morek to beat the hell out of Libero. However, if Morek engages Libero, then they cease to become available to enforce the D'Hara-Luria Nova peace treaty they've promised to militarily back up, opening the door for a new Lurian invasion. At least for a little while. Would Luria Nova be ready to jump on this opportunity to attack D'Hara, though, with the knowledge that Libero might not last long and that Morek could soon come back to punish their betrayal?
Indeed, it's a world war brewing like Dwilight has never seen. It remains to be seen to what level it will pan off. Some nations have all interests to try to prevent it at all costs, like Astrum and D'Hara, while others have much to lose by it not happening, like Niselur.