And move forward they did, towards the apparent source of the noise, though at a downward angle which added to the overall strangeness of hearing an opening to the surface. Though it wasn't out of the question, they were going deeper, so it seemed more and more unlikely. Vents to help air reach the depths of the bunkers, perhaps?

Sheik stopped in her tracks at another noise, a groaning, howling, echoing off the tunnels, most definitely not the wind.

"Pit," she said, training her gaze on the dark hallway in front of them, "you said you knew the effective way to stop some of the creatures."