Trap Ios — Lovely Craft Piston

Mobs will walk onto the solid blocks above the observers. When they step there, the observer sees them and activates the piston.

The floor should look like this from above: lovely craft piston trap ios

T = solid block (over observer) P = piston face (invisible under block? No – pistons push the block they are attached to) Better design: Place the piston a movable block. Mobs will walk onto the solid blocks above the observers