You should see a stack of 12 dragons... took forever for me to afford it, but it was so worth it. Not that I could ever select anything beside it.

You can train young dragons with kingdom diplomacy tech, and it lets you do it with stacks. It just costs 12k gold. Of course by the time I did this I was so dominant I could just hit end turn a ton of times.

Edit: I even tried a "dragon only" challenge one time, it was a blast. Started with 3 nearby goldmine so I was like why not.

Yeah, it's much more efficient to go with several groups of 4 dragons instead of a 12 one. With Dragon Infernal, you pretty much are guaranteed 6 stack gets decimated (can use it twice a round for 144 damage each). Of course by the time you can afford that kind of army it really doesn't matter. Most of the game I was running around smacking stuff with heroes, heh.

Talking about it made me go and dug up the save (wish there was more save info to make finding stuff easier) to pull this screenshot:

That's a 4 stack, a 1 stack and a 12 stack of young dragons in game... 17 dragons, in one battle... does that qualify as epic enough?

Holy dragon****!

The Sagog's Egg quest was how I ended up with my Dragon. 

I've been researching like crazy trying to get the Dragon Tech to appear, but so far that's the one that I keep not getting an option for.  I am seeing the dragon tech as a potential next level tech every time I gain a research level though.

Awesome dragons! On the other hand, the game should limit how many dragons you can bring into one battle. From a tactical battle sense, 12 dragons can't all fit in that little square. Also having a "killer" stack forces people to counter with killer stacks, and you end up with bigger and bigger stacks. This reminds me of the days of MOO where you get 15000 Klackon star ships. I think in Civilization V, they mentioned they tuned down killer stack for this very reason.