Pistons continuously crush mobs against a block.
What is your available (simple or advanced)? Are you targeting mobs or players ? lovely craft piston trap 30 top
Opening a trapped chest sends a redstone signal down to floor pistons. Pistons continuously crush mobs against a block
Walking on a pressure plate cuts power to inverted sticky pistons. Result: The floor opens instantly. Best For: Blind corners in underground mines. 2. The Delayed False Floor lovely craft piston trap 30 top
A simple, cheap design using a redstone torch to invert piston behavior.