Ludwig looked at his eyes, the empty sockets whom he had ignored for some time. If he was honest, although he didn't mind, it was still somewhat embarrassing for him when he looked at it, or to say it better, it was weird.
His eyes were empty, truly, if he hadn't lived in the body for so long, he'd also be scared looking at it. Now that he saw it, a coldness spread around his heart, and he felt scared, beyond scared even, as if it was going to devour him.
At this moment, he suddenly realised. He had no heart in his soul, it wasn't even in his body, it was in the core. If he were to take the core away right now, the whole advancement would fail, how could he accept such a thing? No, the real issue right now was that looking at his eyes like this, they scared him and gave him an eery feeling, even though he was in soul form and defended by a spell.