Kill Robbers Instantly! I hated being robbed on servers and always looked for defense systems. Most involved passcodes or secret doors. Problem with those are, people can just break the door and walk in. Not today! If a thief breaks in you will lose your stuff, but he will be annihilated! Eliminated! EXTERMINATED!!!

What's Gonna Happen?

When a thief enters the obsidian tunnel he will get mining fatigue from an elder guardian (I couldn't get one so I simulated it with a command block). Then the guy without a heart will use an ender pearl to enter a bunker in which all your loot lies. When this guy empties the chest he has five seconds to put the stuff back. After those five seconds, it will be too late and a slime block door will prevent the use of an ender pearl to escape (I could have made that part better) a wither will be summoned. We all know a wither takes a while to generate, so the thief will just be confused by the Boss Bar at the top of the screen. Once the wither is fully summoned, a slime block door will retract and reveal the wither. On top of that, the instant the wither is released glowstone lamps above the player will lift away and allow dispensers to shoot lingering potions of harming and poison. The longest I expect some to survive is 15 seconds.

Oh, and by the way, Withers can destroy the obsidian tunnel so if you try to build this in survival, remember it's one-time use only.

I CHALLENGE YOU TO ESCAPE!!!