Reno Mage is an ever-evolving archetype that grows in strength the more expansions that come out. You can take the archetype in whatever direction you'd like to at this point but I've put my focus on dragons and big spells. Here's my take on a Reno Mage for the new expansion. While most of the cards have been around for awhile, I'll feature a few key things...

Dragons

The new expansion has fittingly given us more dragon cards to work with. The power level of these cards is so off-the-rails that I've adjusted my deck to feature more dragon synergy as a result.

Dragonqueen Alexstrasza: A massive value tool in highlander decks. You could get shafted with some terrible dragons but if you get something huge, the potential is insane. An auto-include of course.

Malygos, Aspect of Magic: The options with this card are incredibly cool and provide some excellent benefits while having a defensive body for trading. The flexibility of choosing a spell that suits your situation is very useful, and justification could be made for any spell being taken.

Dragoncaster: Another fantastic addition due to our other featured playstyle - big spells. We can get some awesome swings by using one of our AOEs with this or pulling off an early Kazakus potion.

Extra dragons: Sindragosa, Kalecgos and Primordial Drake. These are all flexible cards but are in here for their defensive abilities or value generation. If you're finding you need more defense, put in normal Alexstrasza for the heal or perhaps even something with lower cost like Twilight Guardian. I don't think we'll need any more value though. All this being said, I think having 5 dragons total in deck would be a sweet spot to be at to proc Dragoncaster and Malygos (particularly because Malygos would only have 4 to proc off of) and I wouldn't recommend going under that number.

Highlander

All the highlander cards are included because they're just so useful. There's no reason to remove any of them so hopefully you have access to each of them. If you're unable to have all of them, I would hesitantly say that Inkmaster Solia would be the first to go.

Big Spells

You'll notice I've avoided putting in low cost spells for their anti-synergy with Dragon's Fury. This is our only card that gets ruined by having low cards in so you're welcome to add in a few low cost ones if you like (I have Polymorph and Ice Block for example). Keep in mind though that this deck is more about big swings with cards like [Hearthstone Card (Sunreaver War Mage) Not Found], Inkmaster Solia, Arcane Tyrant, Dragoncaster, and Dragoncaller Alanna so every low cost spell you swap out potentially hinders these cards' potential. I have included only the spells I consider critical to this deck's success. The AOEs (Blizzard, Meteor, Flamestrike and Dragon's Fury allow us to contest the board by removing enemy threats in huge swaths while Luna's Pocket Galaxy and Firelands Portal are swing cards for us. Pyroblast may be a removable card in this deck since we mostly go for value, but sometimes the surprise kill does wonders.

No Card Draw?

You'll notice there's virtually no card draw in this deck. It might seem weird, but in a deck as slow as this one, we'll often have a pretty full hand. We'll regularly be playing one card and in the first few turns likely won't play anything as we wait to react to our opponent. While it can be handy to have more cards for more choices, it's not a necessity. Besides, we have options for generating cards like Malygos, Aspect of Magic, Cabalist's Tome, Kalecgos, Zephrys the Great and Kazakus so we aren't missing out on all that much. If you really hate not having card draw, throw in an Acolyte of Pain to help fill the void.

Substitutions

With hundreds of cards in this game, of course there may be some great substitutions in this deck. I won't go through everything as there are probably around 60 cards that you could swap in or out depending on your direction for Reno Mage. I will likely make substitutions myself if the meta ends up being fast (Deathlord, Volcanic Potion, Mistress of Mixtures) or riddled with specific combo decks (Skulking Geist, Dirty Rat). Feel free to put up some of your suggestions as well if you want!