Evolution also requires a lot of energy. The more powerful he is, the more energy he needs to change himself.
These are problems that he has solved with the aspect of Knowledge and Probability. With these two aspects, he can analyze the target to copy, and he can narrow down the changes needed to achieve evolution through Probability.
As for the matter of the large amount of energy required for evolution, it is not a problem to a limitless with cosmic energy. He can perform as much change as he wants forever and ever.
He used the aspect of Knowledge to collect information about his target. He used the information to change himself to become similar to the target. He used the aspect of Probability to narrow down which combination of changes will bring him closer to the state of the target.
As he was doing this, he stopped moving. The ocean of black energy that he had become squirmed and shifted, but he didn't hit the golden sphere anymore.
