This deck is really fun to play with. It's basically a combo deck that can go in several possible directions.
You can either play Jepetto Joybuzz and reduce the cost of two of your three big dragons — Alexstraza, Malygos, or Kalecgos, the latest addition in the Rise of Shadows expansion — before blasting your opponents with a 15 damage zero mana Pyroblast.
Or you could use Luna's Pocket Galaxy and find Antonidas for some Fireball + Malygos shenanigans. In any case, you win by blasting your opponent's with a lot of damage.
Since Jepetto isn't too reliable, as you can simply draw all of your combo pieces before him, this is a welcome set of combos. But if you have alternative win conditions, then this deck will be a sure winner in almost any match-up.