Use this in a hallway. The victim steps on the plate, the floor drops by 1 block, and the roof instantly comes down to 1 block height. They cannot jump, mine, or escape. You can then pour lava from above.
This is the most common variant found in Lovely Craft builds. lovely craft piston trap wiki
: Introduction of Mal0 and five other secret mobs. Use this in a hallway
: Unlocked through specific gameplay triggers during the Halloween update period. the floor drops by 1 block