Many sections of the Prison are flooded, and these waters are home to unseen, dangerous creatures known as Water Lurkers. You cannot see them, but you can hear their splashes and feel their presence. To cross flooded areas safely, you'll often need to find a way to drain the water or create temporary pathways using planks or crates. Moving slowly and quietly through the water is essential, as any sudden movement can attract their attention. If you hear them approaching, stand still on solid ground until they pass.
