Everything around him was so vivid that it was almost impossible to distinguish reality from a dream, until he pinched his own arm and felt nothing at all, accompanied by a strange, heavy sense of helplessness. It felt like trying to run with all one's might yet being unable to move fast, accompanied by a slight dizziness in the head.
Only then did he truly believe he was merely dreaming.
"Don't let your mind wander."
Chapter 338