Nice call on
Realmwalker, I forgot to check changelings. There are certainly a few... questionable options. I was thrown the idea of UG Dragons, and threw this together on a couple of fast searches. Let's face it... Ugin really doesn't have a place here, the dragon themed draws are... acceptable.. at best, Dragon Fangs lies cut... but a number of cards remain for 'thematic' purposes. I pretty much went in with the dragon theme after I saw the results of some of the searches.
I'll have to consider
Descendants' Path and the horn. I don't know that the horn will be much better than a mana rock though, Volo draws a lot already, and I'm not casting much more than a dragon per turn, unless I'm already winning. Still, I should probably try it. This is certainly the deck for it, so, why not.