This is a PVP arena where both players will be teleported to their side of the arena. The only problem is that there is an obsidian wall in your way of getting to the opposing player. In order to get through the obsidian wall is to mine through the many layers of blocks on your side and get the diamond. The blocks are wood, cobweb with a chest containing 27 feathers, gravel, stone, coal, iron, and diamond with 3 layers. In that order.