Eren didn't simply feel the pain of his skin being clawed out. The pain was felt through his soul and mind, as if thousands of poisonous ants were biting all over his body.
At this point, Eren realized that the goddess was probably the worst thing to have happened to him. She didn't just want him to suffer because she hated him. Instead, there was an element of greed in her actions.
He didn't understand where that greed came from, but he did realize that he was going to go crazy if he didn't stop her. His mind was going to be completely destroyed at this point.
It was the worst pain that he had ever felt before, feeling as if a part of him was dying with each passing second. After clawing the entire right side of his face, the goddess placed her nail on his forehead, slowly stabbing them inside.
The pain only increased, growing much worse. At this point, Eren couldn't even think straight about the skills that could help him.
