War Against CARNAGE.

There was a swift and violent reaction to the red eclipse of the lumen plane. Some people didn't take this event lightly. They thought that there had to be something very wrong when the sun was blocked. An eclipse is not normal. These powerful individuals could also sense the demonic influence spreading throughout the plane. What's more, is that they couldn't leave the plane because the planar portal had been blocked by a spawn of CARNAGE. 

To observant people, all of these signs were an indication that there was something very wrong going on in the plane and that it probably had something to do with a demon God. Specifically the demon god of Carnage. 

So the different families contacted their origin God ancestors. Even world gods heard of the unfortunate development but they couldn't come to help. World gods are not allowed in the realm tree. So the responsibility of freeing the plane fell to the Origin gods. Thousands of them came to the rescue.