Cain's situation was horrible, and his life was in extreme danger, to say the least. The interior of the black hole was a dimension where the Laws of Space were twisted to the point that moving forward or back was impossible, affecting all his senses and making just staying conscious incredibly hard.
However, his mind and senses were not the only ones affected. The monstrous gravitational pressure struck every single cell of his body, causing blood to leak from his eyes and ears. It was only a matter of minutes before his internal organs succumbed to the pressure, and he perished.
Cain's normal eyes were useless, but fortunately, his Space-Time Eye revealed fine and blurry lines, which were the matrix keeping this dimension in place. These were the same lines he had struck before with his Solar Flare Blitz. While his attacks from the outside were insufficient to break it, he planned to attack from within.