Minecraft wiki entry for Creating_a_challenge_map, associated text: Make a command block that clears their items from their inventory. Make a new spawnpoint for the unlucky player in a bedrock room with no way out. Make a map that is near impossible to complete. (E.g. Parkour map.) Add a few small rewards for the player to progress. Make the level really long with no checkpoints. When the player reaches the end, make a hidden button teleporting to the end of the adventure map in a good way. (WARNING: Contains spoilers) In the bedrock room, make a sign saying: