"WANTED: Someone with a good head on their shoulders and someone who knows how to vibe with Stoker Class dragons. They're not easy to handle, after all. Meet me at Scuttleclaw Island if you want that challenge." - Snotlout
Yo! I'm glad you're here. It's an 'all-hands-on-deck' sort of situation, and well, there aren't enough hands here to deal with this problem.
The big problem is this: there's a giant iceberg on a collision course with the island! I know, I know: 'let's nature handle it' and whatnot, but this stupid thing might crash into a small nest of Scuttleclaw eggs I've been keeping an eye over the last season. So, let's get rid of it, okay?
Let's get started. First, catch an Arctic Char. What does that have to do with an iceberg? Patience, young student.
FIRE! That's my grand, brilliant solution! I hope you're good with Monstrous Nightmares, [your Viking's name]. Reach out your hand and touch the fearsome dragon, then mount them!
As we all know, Stoker Class dragons are the best dragons around. So the fact that you were able to use fire with them and do some damage is really good! I gotta say, you're earning some respect from my eyes.