They will eventually leave the Dark Forest.
Although Ash destroyed the permanent Space Gate the moment he arrived in Senluo, with the millennial foundation of the five nations, how difficult would it be to build another Space Gate to Senluo? Staying in Senluo would only await doom, much like hiding one's head in a hole, thinking it could conceal oneself.
Moreover, Ash was about to collect all traces of Igula and Harvey in Senluo. To continue exploring Hell, he must venture to the Kingdom of Gospel and the Kingdom of Blood Moon, retracing past journeys against the flow of time.
Ash dared not stop, with the world-ending threat of the devouring World Snake, the menacing gaze of the Final Five, and the covetous Supreme Star... How could he dare stop? He is no longer alone; this world is in turmoil, and he must forge ahead to shield others from the storm.
So, he couldn't bear to see Silver Lamp soaked in the rain alone.
