It was the first time the entire world worked together to plan a battle against a common enemy. The Hive and the Council had already helped each other in the past. Still, the Shandal Empire's addition improved that already solid alliance.
Something similar had happened during the winged beasts' crisis, but the situation was different at that time. The organizations could prepare defenses together and plan strategies that involved all their forces at that time.
The usual divisions that involved those forces fell apart in front of King Elbas' threat. The Matriarchs and Noah knew that their lofty status in the world would crumble if they let the Royals' leader retake control of some regions.
The goal was to kill him or banish him again. Sending any heroic cultivator in the void would condemn them to certain death. King Elbas had managed to survive the last time only because the separate reality behaved differently.