Deviled Water is a world event in Jorvik in Assassin’s Creed Valhalla.
Your task is to help a guy jump into the cold water for baptism.
Here’s a walkthrough of Deviled Water in AC Valhalla.
To begin the world event, get to the location shown below, marked by the map marker.
Talk to the men
You will see a religious figure and some men near the water. Talk to them and they’ll comment about baptism or something to that effect.
If you look at the river, there’s a guy on a boat who is supposed to jump in but the water is too cold.
Burn the boat
To get him to enter the water, just throw a torch on the boat and the guy will jump.
The world event ends after the baptismal rites.