Rabst confidently led the way in the dim sewer, his feet soundlessly stepping on the damp stone ground next to the slowly and silently moving stream of dirty, rat-infested water. Occasionally, he would stop and put his hand against the mossy wall with closed eyes.
Zach, who was behind him didn't ask him why. He was happy knowing Rabst wouldn't get lost. It also seemed like he had good senses. But Zach still had a barrier around the group in case there were any traps or ambushes waiting for them.
But they walked for what felt like hours without anything other than a few rats trying to launch themselves at the barrier. The dim light and the endlessly winding sewer tunnels made it impossible to walk fast.
Zach had a feeling Rabst wouldn't have any trouble running around, but if he did, he would inevitably leave the others behind. And if Zach got separated from the others, he could spend a lifetime wandering around underground without finding a path up.