People have wanted to play as Dragon PCs in D&D for as long as the game has been around, and there are so many to choose from. Dragonborns are a nice fix, but not the best solution. Now, why is this an artificer subclass? Specifically, why does it go well with Storm King's Thunder?
Well, this subclass has spoilers, although vague, there is something affecting the mental state of denizens of the North. This maddening force has resulted in many artificers becoming mad scientists. These mad scientists have gone to great lengths to become greater. At first, this subclass' mechanics were part of a much more complicated and klunky subclass. That is why there will be more mad scientist subclasses coming soon with different focuses.
For now, tank like a dragon, fly like a dragon, rule like a dragon, and yes, breath like a dragon.
- from the publisher's blurb