What he saw was certainly not what he was expecting.
Though Nonexistence was always removed from living beings, its form was humanoid. Its desire to be recognized by the people of the world made it take a form that they would sympathize with.
Existence was different. It was recognized regardless of what form it took, and as it had no such desire to change its position, it never took a single defined form.
Damien's eyes landed on what could be considered a monstrosity. It was a combination of everything in the world. In one sense, it was a massive chimera of all that existed, a gruesome entity that was difficult to lay eyes on. In another sense, it was a being with no definite form that constantly shifted between the different aspects of Existence.