Scattershot Nightmare OTK

Based on Scattershot OTK (ft. Stoneshaker, Knucklebones).
Changes are based on trying to shore up the aggro matchup and just generally tune the deck a bit further, but its worth noting that this is all theorycrafting. I haven't had a chance to play either version of the deck yet.

Why I removed things:
Nocturnal Observer is a trap. Paying 3 mana to draw your opponent a card is not how you win against aggro.
Amethyst Waystone goes way down in value without a way to take advantage of night, so we drop to two copies to make sure we see it a little less frequently.
Without Grenadin Drone which frequently shows up in these types of lists, the Madness/Combust/Devour package becomes way way weaker, so I cut the whole thing. Two Devours stay in as a way to protect combo pieces from silence effects and to help get stoneshaker into the void so you can start reanimating it.

Cards that got added:
Hailstorm is for the aggro matchup. Unfortunately this also kills all of our units, but we can play around this, and binning some of our units is even a good thing.
Permafrost: some more general purpose removal since we don't have combust anymore. Very critically, this can answer Teacher of Humility on curve which murders this deck.
Levitate: in addition to being another way to cycle our deck, this can pop aegis or give our Gorgon Fanatic a way to get in and start the card draw train.