It's starting to get chilly again
Fishlegs: "It's starting to get chilly again, and you know what that means. (I'm sure you've spotted the twins' festive decorations by now.) It's time for the Dreadfall! Can you fill Valka in on what this holiday is all about?"
1- Talk to Valka about Dreadfall at Berk
2- Talk to Snotlout
3- Talk to Ruffnut about the Dreadfall
Ruffnut: "So, Snotlout's not a fan of the Loki's Maxze of Mayhem? I'm not surprised."
Tuffnut: "Yeah, he's never been a supportive friend. Remember when we put the nest of snakes in his bed? He didn't even notice that they were spelling out his name!"
Ruffnut: "What a philistine. [Your Viking's name]! I know that you're a good Viking and you can appreciate a masterpiece when you see one. Go across the bridge away from Berk and see Loki's maze of Mayhem with your own eyes!"
4- [Follow the arrow]
Tuffnut: "I hope you're ready for some chaos... he he he."
Note: this quest was introduced on October 23th 2016 as part of update 2.3, for the re-opening of Loki's Maze of Mayhem