The main Idea is kill my enemy with dragons and Molten Phoenix. Phoenix stone should be the first thing to take from market, unless u really need a torrent or bore (which is unlike at 3). Harsh rule and end of story are board removals that is really good this set, so be careful at playing your units.
Lightning storm is pretty good card in this deck, it can beat aggro decks, break aegis to harsh and more important: don't kill your dragons. Warhelm can be perfect if your opponent has a "do nothing deck", or a good target for torrent is he's playing some kinda of aggro, but the idea is to active firemaw.
Eilyn's choice has been a better vanquish since it can block 4 cost+ spells. Long live the queen is a warp card, it can any cost spell and make your deck thin for what I want, (I was thinking in change it) but along all my games it has been proved for me that is a sweet card and don't need change.
I don't have Kenna, so put it Eilyn, it's not bad and I got many results just cuz the endurance, might be more interesting to have than Kenna.
That's it for the main idea and some of "unusual cards" on this deck. Hope u enjoy it!