Yes, Shades can attack your defensive structures to try and get to your base. If a Shade destroys a defensive structure, then that structure is gone and you will no longer be able to build on that space. You also will not get any Tools back.
Yes, Shades can attack your defensive structures to try and get to your base. If a Shade destroys a defensive structure, then that structure is gone and you will no longer be able to build on that space. You also will not get any Tools back.