Gale Force Nine Store BB628 AccessoriesBattlefield In A Box Caverns of Ice Encounter Map 30 mm Ice Cavern Encounter Map contains a high quality vinyl surface that is an ideal battle grid for staging encounters. The mat may be marked with WET ERASE markers to temporarily alter terrain areas or make other notes about battlefield conditions during play. The Encounter Map measure 20 x 30 and is marked with a 1 grid. All our games are designed to be: Accessible easy to learn and approachable by