God of War Ragnarok: In the Dead of Night
This guide shows the complete walkthrough of the In the Dead of Night Favour/ Side Quest in God of War Ragnarok. To be able to do this quest, you need to flood the crater by completing the Return of the River favor.
Go to the dock at the Jungle Entrance as shown in the picture below. Hop on the boat there and row north through the tunnels. When you reach the rift as shown in the second picture below, go left. Keep rowing west to reach the western dock in The Plains. Get down the boat and proceed ahead. As you jump down the ledge, you will be attacked by a Dreki, starting In the Dead of Night Favor. Slay the dreki to complete the quest.