Wither Run

Wither Run is a fun minigame where a wither spawns and you have to survive for as long as possible. There is a built in timer so you know how you are doing. When you die, game over! This map uses spreadplayers, so you can do this on only one world. A counter goes 5... 4... 3... 2... 1... and then a wither spawns. You will be put into adventure mode and you cannot attack the wither. Try to keep from being killed. The wither also kills animals, but this is not intended and there is no way to fix that. 

To Install, get the MCEdit Schematic and download MCEdit. Create a blank world in Minecraft, and open it in MCEdit. Click the "Import" button and navigate to the .schematic file. When you have, click OK. Place it where you want. DO NOT ROTATE OR IT WILL BREAK! Press enter and then save. Go back into minecraft, and there it is. Push the button to play.