Minecraft wiki entry for Creating_a_challenge_map, associated text: This map is for getting as much gold as possible. First, use commands to fill Y=1-Y=64 with stone, removing all ores and generated structure. Have 1 layer of grass blocks on Y=64, and turn off mob spawning and mob griefing. Set the difficulty to hard. Build a hollow barrier cube, 2048*2048 (l*w), all the way down to bedrock, and up to the world height limit. Then, make a layer of diamond blocks at Y=40, and a layer of gold ore at Y=10. Have eight bedrock cubicles, one for each player/team, with two floors each. On the first floor, of the cubicle, include only an entrance to the barrier arena. Have 6 furnaces and a chest with mining supplies. Only include one iron pickaxe for each team member. For the rest of the items, add only one iron shovel, one stack of wood, cobblestone, coal, and torches, and 2*(#of players) stacks of food. On the second floor, include a double chest, for all the gold ingots. Have the judge in the center of the arena with a 12 hour hopper clock linked to bells around the whole arena. Cover 8 wither skeleton spawners with barrier in a way that lets the skeletons spawn. Give each person/team a sapling.