It would be cool if your hero can obtain xp during battles and defense. Maybe a tiny amount to help with upgrading? Not sure exactly how it would work, but a lvl 1 king could need 1,000 xp to shorten or reduce the amount of de it needs to upgrade (say by 1%)? Lvl 39 hero would need 40k xp to reduce de/shorten time by 10%? Just a thought. I mean we get xp for hitting th's and clearing things - why not the hero?
