The time within the ruins synchronized with the time outside and was still dark.
It was the perfect time to sneak in.
Otherwise, it would be dawn outside after an hour or so and much harder to sneak inside to explore.
Su Mo decided in his heart and turned his head to give the two brothers instructions.
The two initially wanted to dissuade Su Mo from entering such a dangerous place alone, but after recalling his terrifying traveling speed, they had to accept that he was indeed capable of sneaking in alone without any burden.
The probability of being spotted would be doubled by at least twofold if the two of them were to follow him.
In the worst-case scenario, if something bad happened, Su Mo could easily slip away alone, but it would be hard to escape with two of them as a burden to him.