User Summary: Textured Swamp Water Terrain Tray - Single (w/ GRID) is part of the Wildlands wilderness terrain series. Terrain trays are made of thin ferrous metal sheet so the magnetic pieces can stick to it. Different terrain artwork printed on the surface of each side. This item was initially available as an add-on during the Wildlands Kickstarter. Textured Swamp Water Terrain Tray - Single (w/ GRID) comes with 1 Swamp Water / Dismal Quagmire 12x12 (w/grid)