Cult of Allgod

Cult of the Allgod a religion that intiated in Temerian province of Velen around 1170 by certaing sylvan who calls him self after that Allgod and human Roslav of Oreton. A diety demands lot of food and wine as sacrifices even in hard times of war.

The Witcher 3: Wild Hunt
There are three ways, either Geralt of Rivia convince false god to take less expensive offers, kill him and tell villagers that or argue sylvan to leave them but be careful the second and third option will realy piss of inhabits and you can not count on reward in that case.