The 8th stage of the annual John Van Caneghem Tournament (2007).

All the dragons, Crag Hack, and the other three "roaches" were taken care of in one day! Just got lucky. :)
If one of them had escaped, I would have probably had to restart the game...

It took me two days to deal with the dragons and heroes. Some of them were quite far from their castles, especially Crag. He had two castles under his control. On the first day, I captured all the teleports and took both castles, then I hid my main hero to lure the AI. He even managed to recapture one of the castles.