This page has sections which are under contruction You can help the wikia by expanding it, just press the "Edit" button.The Great Wall Plane Wonder. Level Cost Effect Any 8 + 4 + 4 + 4 1 As above at level I In Space, planet collection efficiency +2% Class U Energy planet collection efficiency +2% 2 As above at level II 3 As above at level III 4 As above at level IV 5 As above at level V Categories: Page Stubs Plane Wonders Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.