Heather: "So we know that it's sulfur dioxide gas that is making everyone sick. Your clothes still smell like rotten eggs! We can't get rid of the sulfur dioxide, so we'll need to figure out a way to go into the fog and breathe without getting sick.
Maybe we can update the design of the mask? Hiccup might have a good idea."
Tuffnut: "Ahh... did I hear my favorite phrase, 'the vile stench of rotten eggs'? Sorry bro, ah Hiccup, but the Thornston twins are experts at creating stench wrenching stink bombs, AND we know how to filter stink from the air with our extensive research. I got this!
[Your VIking's name], come find me at my secret testing grounds!"
1- Talk to Tuffnut at the School
Tuffnut: "We've tested over 450 different materials to keep the stench out! First, we tried water as a filter. Pro tip: don't try to breathe water! I almost drowned.
So Ruff tried a mud mask over her face and nose. She passed out but her skin was positively glowing!"
Ruffnut: "Cool, someone new to experiment on... ah, I meant with. So you want to be able to breathe in that smelly gas, huh? You've come to the right people. We take pride in our ant-stench solutions! Here's our latest."
[item: 1 Charcoal]
Tuffnut: "Geez, spoilers Ruffnut! Let me finish my spiel. We couldn't see through the boar's bladder... chrysanthemums tasted awful... then there was the infamous Yak incident!
Finally, the one that worked was experiment #451-- charcoal lumps, stuffed up the nose of course! We get some odd looks from Vikings, but we're used to that.
Take this charcoal back to Hiccup and tell him it works better than 450 other things."
2- Give Hiccup the charcoal
Hiccup: "Hmm. Well charcoal is very porous, so maybe the twins are on to something.
We'll need to cover up the nose and the mouth to filter the toxic gas, so we'll make some sort of a breather mask. We're going to need to get more charcoal, a canister from Gobber, and a hose from Heather. I'll do more research while you gather these components!"
3- Collect charcoal from a fire pit in the Wilderness
!: "The charcoal here was once wood, but turned to charcoal through fire and heat over a long period of time."
4- Get a canister from Gobber in Berk
Gobber: "Now what's Hiccup tinkering with that would need a small canister? I taught him nearly everything he knows, but somehow he still surprises me every day! Here, this should do you well!"
5- Retrieve a hose from Heather
Heather: "Here is an extra piece of hose that I had in the Lab. Tell Hiccup that I want a look at the schematics when he's done!"
[item: 1 Hose]
Hiccup: "Okay! I think I have a design that will work. If you give me the materials, I can make you a prototype!"
6- Return to Hiccup with the materials
Hiccup: "A charcoal filter works a lot like a sponge. It soaks up impurities-- the sulfur dioxide gas-- in the substance that is being filtered-- the air we breathe. The gas adheres to the surface of the charcoal in a process called adsorption.
This mask should keep us from getting sick from the gas because it'll keep out the toxins in the air!"
[item: 1 Gas Mask]
Hiccup: "It's still just a prototype, so we should test it in a safe location before going back out to the fog. And, well, terrible smells are the twins' specialty.
Can you meet Tuffnut and see if you could test the mask with some of their special stink bombs? Just... please do it someplace away far away from everything else."
7- Speak with Tuffnut
Tuffnut: "Ah hah! Hiccup used our filter technology! I prefer charcoal lumps in the nose but I guess a breather mask is cool, too. I'll talk to Hiccup about royalties for using my idea later.
We have high wind warnings from the Timberjacks today so we'll have to scrub stink bomb testing in our usual location. Don't worry, we have an alternate location in mind..."
Ruffnut: "I like having someone else as a stink test dummy! Okay, you stand in the middle of the room with your mask on. We are really going to get a good stench on you to see if the mask works.
Heh heh. I love my job. Click on me when you're ready!"
[you are teleported to the Club House. ]
8- Talk to Ruffnut to begin the test
[Animation of Ruffnut and Tuffnut throwing a stink bomb at you, and Snotlout fainting.]
Ruffnut: "Yes! The mask works and Snotlout gets Loki'd? Double plus!"
!: "You should make sure Snotlout is okay."
9- See if Snotlout is ok
Snotlout: "Oh Thor... it smells worse than the inside of my father's boots! How is this possible?
I only came in here to tell you Fishlegs is looking for you. This is what I get for trying to help others!"
10- Talk to Fishlegs at Dragon's Edge
Fishlegs: "Hi, [your Viking's name]! What were you doing in there with the twins?
On second thought, I don't need to know."