The Mythras GM Screen contains 16 11x8.5" cards featuring artwork and essential tables from the Mythras core rules. Seven of the cards feature cover artwork from Mythras titles and are player-facing, while the remainder contain the tables and charts that GMs can insert on their side of the screen according to play needs. Don't need the Theism charts this session, but you do need travel tables? Simply insert the Travel & Environment card along with three others that will be needed for play. The set even includes a duplicate, player-facing copy of the Special Effects list.