Minecraft wiki entry for Player_versus_Player, associated text: Usually, this defense contains hard vital redstone and using this kind of trick is very tactical. Using hidden rooms can hide you through the unknown. For example, if you're at low health, use a special tactic to escape the enemy in a short period of time. Creating a hidden area on the battlefield supports your life, and creates and connects areas to explore. It takes hard work to create a vital escape away from enemies only using pistons and redstone from small spaces and thick areas. This kind of defense can support your life without pets, can hide you from strong enemies and can ambush enemies in a hidden open.