The Pit of the Goddess

Sacred Location
On the new moon, the villagers of Sydlagir will pile what they wish to sacrifice to the goddess in the middle of the village. From there, the priests take it to The Pit of the Goddess and thrown everything in.
The Black Brothers tend to not sail south. Their ships aren't really seaworthy and so have to stay close to the coast line: this puts them in the range of pull of The Pit of the Goddess
The Waldschnayzin also worship at The Pit of the Goddess although it is known as the womb of Damkina. They throw 10% of everything they get on their raids (including living slaves) down it.