The idea is that there would be a coulple of these ruins scattered around the map (two-four at the very most) they are basically ruins that (at some point in time) served as a magical defense for a race of ancient beings. Although the beings are long gone, there magical defenses remain (just a quick story i thought up
Each one would be assigned a random power at the start of the map. (Ie: healing, fire bolts,) they can be captured by any player in the same way as TC's are. The controlling player gets to use the ruins effect once per turn (depending on what that effect is, and if it has a cool down time) they would have 2 spaces for units inside of them. Like tc's, the only way to stop them is to capture them yourself.
So in short, they are great defective buildings armed with a random magical effect. That for the most part, behave like tc's (excluding the unit creation)
This is mainly an idea for multiplayer matches, and there should probably be an option to disable them in the games start up
I really think this would help to make AOF its own game rather than an adaption of AOS.
Feed back would be appreciated, thanks!