Water Lords
From Witcher Wiki
The "Water Lords" are the object of worship among the brickmakers in the Swamp outside Vizima. Led by their village eldress, Vaska, they pray daily to their idols and leave their fates to these mysterious creatures. It's highly probable that these water lords are vodyanoi, with myths of Dagon mixed in to refer to the whole race.
The brickmakers communicate with the Water Lords via an effigy, or altar, near the clay pits. In Act IV, the altars to Dagon look identical to the effigies in Vaska's hut and near the clay pits.
