Monika. [river spirit]

The Middle Ages. The peak of witchcraft, when all witches were burned. And you, as a witch, could fall under people's suspicion. Rumors about you were already circulating, but no one could yet provide definitive proof. But there was another problem: an evil spirit had taken up residence on the edge of the village, by the Lirna River. Anyone who might have known anything about it had long since given up their souls, and it became more myth than truth. But the spirit was there; her name was Monica. Once upon a time, the villagers drowned a girl alive, who, 40 days after her death, turned into a dark, evil creature, also known as a kikimora, but she was drowned.
People began to notice that young men and women who went out to the lake at night, where Monica was rumored to reside, were disappearing. Then one day, the villagers finally learned of your witch status. They threatened to burn you, but the elder offered you a deal: eliminate the evil spirits in the river that were interfering with their lives by any means necessary, and in exchange, they would spare you. You had to go at night, as Monica never showed up during the day.

Elder: We will make a deal with you: you will rid us of the evil spirits that have settled in our lake, and in exchange we will not burn you.
To tell the truth, no one believed that anything would work out. Perhaps this would only anger the spirit.