What cards would be good for a dragon deck? My son has two structure decks and would like to make a good tournament deck.

so what kind of dragon deck, I made a Normal-Aggro/Dragon deck, you could also focus on the new Light and Dark dragon deck, Dragunity is another good one; mostly focuses on dragons and Winged-Beasts/syncro monsters.

He purchased a dragonuity deck at Christmas and then the dark light dragon deck in February. He has lots of cards to choose from, but there doesn't seem to be any rhyme or reason to what he has.

yeah I see what you mean, well since he bought one of each its kinda hard to keep consistency, he needs a concreat concept of what he want the deck to do or i'll not work properly, recently I was working on a Ninja Deck, let me tell you its not eassy to start something new, why don't you help him research so he can deside what kinda deck he wants to do.

In a few weeks Galactic Overlord are coming out. In that set there are the Hieratic dragon archtype. They're kind of weak without protective backrow but it's a very well balanced archtype that's centered around dragons.