The Angels had gone past the Undead Generals, who were unable to regenerate. They stepped through the doorway that led Karyk to the real bodies of the Angels.
Although Karyk could see them passing through, he could not shift much focus onto them. His entire mind was consumed by a singular objective: devouring the universe.
He knew that if he stopped now, it would be a failure. All his hard work would go to waste. Moreover, he might even face backlash if he lost control.
In his weakened condition, he couldn't get past the Angels to return to the universe. Staying here was a death wish, as the Angels were about to awaken their real bodies.
In this situation, it made sense to think about his own safety. However, Karyk cared about that the least. Death was inevitable, especially for him. Even if death was to come, he wanted to embrace it on his own terms, not like a coward.