This is a concept I was thinking about before hand and since you just unlocked the Kingdom builder and I know what aligment you picked for your town I thought I'd share it with you.
Basically I'm going to have hidden in this world ether by lost knowledge for special buildings. These buildings for your town will be expensive in the most case but will give you certain Meta-Game Feats. This is one example of one that you can't get at this point due to the aligment you picked for your Kingdom. Now I should point out that I am offering these to you as the GM and thus if I find that I did not see how much of a game breaker it will be, I reserve the right to destroy that building and rework it. I will give you back your BP's that you sunk into it though along with a free build to cover that since it's fair. But I do reserve the right to do so. Anyway here you go for an example.
All Seeing Eye (200 BP): 4 Block occupying building Prequisite (Evil Aligned Kingdom)— The eye makes you ignore the unrest of your kingdom. Through it's powers you can see all throughout your kingdom and spy into other kingdoms as well. Thus any unrest you have in your kingdom can quickly be quashed with little to no effort. So while you continue to record Unrest you will never lose any part of your kingdom to Step 4- Unrest phase.
You do keep Track of unrest though since if you get to unrest of 50+ the kingdoms have became wary of you and will declare war.
Economy+10; Unrest –10; Defense Mod +15[You must be registered and logged in to see this image.]