THIS passageway was only one-way. That meant that by the end of it, Luo Yan would arrive at the room where the body was. So, he just ran. It would be good if he reached the place before the effect of his cloak disappeared. It would add another layer of assurance to him.
Although Beelzebub said that there was no trap inside the room where the body was, what if some dark mage went there to check the body or something? He didn't mind fighting. But that might attract the attention of the other dark mages. That's the last thing he wanted. Especially when his goal was to get the body out of here as quick as possible.
He looked at his Status Window. There were only three minutes left before the effect of the cloak disappeared. He quickened his steps and ran at his fastest speed. The continued darkness in the passageway didn't disappear. It just continued on and on and on. Like a dark tunnel with no end in sight.