So their very attempts to stop him was reinforcing his barrier. It couldn't be helped. As a god beast who has been born with the innate ability to manipulate cosmic forces, only a Supreme Origin god can match him as he is. If they wait for him to become fully mature, then only world gods will be able to match him.
Legion-8 was disdainful of their attempts until Supreme dragons came to stop him. He didn't wait for them to make their moves at all. He released his dragon breath wantonly at any target that he considered dangerous.
Light disappeared from the world as soon as his breath appeared. The whole plane was plunged into darkness because light and every form of energy around him were being used to power his dragon breath not his own energy.
Then a white pillar was produced from the center of the zone of grayness. The white pillar separated into several beams that twisted and turned to reach their target.