You sprinkle the dark water on all the graves, from a safe distance.

The wall changes shape, creating a hollow in which you can see the only door out of here, but blocking the field, hiding the fence. You try to take the water bucket with you, since you're lacking a companion on this journey, but you don't have anything to cut the rope with, and it's too slimy to tear apart or fray on any of the graves.
You walk into the hollow, leaving the graveyard behind, and you could swear you spot spring flowers growing where the droplets fell.

Next.