To craft a portable piston trap, you'll need a few basic materials, including:

Place an observer facing into another observer. This creates a 1-tick pulse generator (the fastest clock in the game). Connect this clock to both pistons via redstone dust.

To trigger the achievement, the trap must meet three criteria:

These traps can sometimes be buggy on different server versions (Java vs. Bedrock) regarding suffocation damage. Test it on a friend (or a villager) before relying on it for defense!

By following this guide, you have learned to: