Ok so I have idea that we can have some new walls.

First, EMP wall. Inside that wall emp has no effect, like in gravity wall (or something), but with emp.

Second, less useful but still, aheat wall. Works like previous, but blocks aheat inside it.

PS does anyone know how sand effect work?

yeah emp might be hard to code, but think, if u playing on snapshot(where is slcn) you could make vibr factory from iron, coal, ttan and slcn. ez