Drone tower: Gives cities within working distance the ability to work 1 more tile. (similar to the drone command.) Always gives 3 production (similar to the Terrascape). 5 energy maintenance. (gains bonus's with research). Second idea is to make nodes gain bonus energy for every other node surrounding it. (visually you'll see them linking with energy) I like that one because it fits the theme of supremacy: you gain bonus's for massing things together. My third idea is more of a combination of the two. Drone towers give an extra worked tile, and gain resources based off of what is around it. for example, every academy it touches gives it +1 science. I feel this is more of a harmony thing, as it works best when separated. My fourth idea is to make a "drone command" wonder, it's similar to the victories wonders in the sense that you build it on land. It automatically works itself, and the 6 tiles around it.