Wonders have only been used for victory condition and decoration so far. So if no one has suggested this before, why don't different wonders gives out different aura? Aura like raising unit morale and attack strength etc, and slow healing for certain wonders. At least there would be a reason for us to build wonders from now on Wonders are pretty expensive to build, so having an aura around it is a very good reason to build it more often. I think this is a simple, yet good enough as part of the major feature. What do you think, guys?