Cain was oblivious to the outside world and, to be honest, he didn't really care. The Power of Order was acting at its highest level, blocking everything else since, deep down, he knew that this moment could mark a transcendental point in his path.
The purified soul force of millions of foot soldiers, hundreds of Sky Masters and Sky Lords, and more than ten Legends who had perished in the battle for Bravos flooded his energy pool, exerting immense pressure on it while nurturing it at the same time.
Very rapidly, the massive crystallized energy pool began to condense. The process would normally take decades, maybe even centuries, but by using such a massive amount of soul force, it was sped up exponentially.
Of course, such speed brought risks, but Cain had made sure to refine his Spirit Force to the absolute peak, making his energy pool extremely stable. The addition of the Star Brain had brought his soul all the endurance it needed for evolution.