Indeed, he still had one trump card he had not yet revealed.
That was the Soul Refining Flag.
Although this Soul Refining Flag had completed its Blood Sacrifice, it had not yet truly bound a Soul General to command.
However, its power was not to be underestimated. If Shen Mo were to draw upon this flag, he would still have a fighting chance.
However, this Soul Refining Flag had questionable origins, making it too sensitive to be revealed easily. Moreover, he had initially planned to use the Soul Refining Flag as his ultimate trump card at a life-and-death juncture. If he used this trump card in public, it would no longer be a trump card. Exposing his trump card merely for the title of top newcomer was simply not worth it. It was better to maintain a low profile; after all, life was paramount!
In the end, Shen Mo abandoned the idea of continuing the fight.