Water Flow is a stage element on Plague of Shadows and Specter of Torment. It will pull the player to the direction it points.
Plague of Shadows[]
In Plague of Shadows, water flow acts as a minor stage element. It only appears in the Village, in the section between Hedge Pupil' s house, and in Mona' s room.
Specter of Torment[]
In Specter of Torment, water flow acts as a major stage element at the Explodatorium. It can also spread the effect of the potions dropped by Potion Dispensers or a Macawbe.