Chapter 620: Another Route

Raphael recalled, then said, "After we ran into the drake serpent, we panicked and just followed the river downstream, running along the bank without paying attention to how deep the water was. By the time we got near the underground buildings, the river was less than half a meter deep, so we could walk across. But thinking back, we didn't notice any movement in the water when we got close. The drake serpent is huge and could hide its whole body underwater. So, this underground river here must be...