For example to cast spells you need people who aren't working to worship at your temple. The problem is that these people don't stop to get food, so you need to provide it. To cast spells you need the energy those worshippers provide. But if you're using that energy to cast stupid food spells, then you won't be able to use it for other things. Then there is the problem with running out of wood.
Wood seems to be in scarce supply.
But it's hard to watch over him and maintain your towns at the same time. However training your creature is actually very well designed and the AI is quite impressive. Well despite all those rants, the game really is very fun. I'll wait on passing a final judgment on the qualitiy until after I've had it for a couple of weeks. If it lasts that long on my HD then I'll give it a thumbs up.