Quick Travel, Double Men, Be, No Slicing, Brain-Burning, Small World Can't Understand It in the Later Stage

I can't find that book! ! ! In one of the small worlds, the male protagonist is a demon who has done many evil things. He was caught by the male protagonist of the small world (his whole family was killed by the demon, there was a misunderstanding) and was waiting for execution. During this period, the young male protagonist always had nightmares (the male protagonist's past) be