Minecraft Dungeons:Launchpad

A launchpad is a spring-like contraption that launches heroes and mobs upward across large gaps.

Obtaining
Launchpads can usually be found in the Obsidian Pinnacle and Gale Sanctum, though one also generates in ???, a few generate in Camp behind the Church, and some generate in secret locations in the Overgrown Temple and the Frosted Fjord.

In the Hidden Depths DLC, they are replaced by clams while in the Echoing Void DLC, they are replaced by bouncy green cubes.

Usage
A launchpad consists of four pistons in a square formation that extend when a hero or mob steps on it. Sometimes they can consist of only one piston, like in a secret area in the Lost Settlement.