Tribulation And Suffering.
The next thing he did was to change his location. It is a precaution. He is too close to the realm tree for comfort. So he moved deeper into the void.
Then he initiated his breakthrough by recalling the Origin essence that Legion-1 gave him when he reincarnated. That essence is deep within his Origin. That means it is close to Legion-1's inner world since Legion-1 is in possession of their Origin. The Origin essence appeared within his inner world now and began to permeate his existence.
The major goal of the Origin essence was to make him whole. It wanted to fuse every aspect of his existence so it tried to make every part of his existence become one. That includes Legion-1 and his other 8 divine abilities.
All of them fused with him without a hitch. His strength began improving with the consolidation of his existence. This is because his immortal seed of power is becoming one with him.