The Liquefier is the product of Cybertronian science. It produces energy waves that turn solid matter into liquid, from the hardest metal to organic matter.
The Liquefier was among the artifacts that made their way to Earth. It ended up in the ocean near Griffin Rock where it was inadvertently activated by Madeline Pynch's oil drilling operation. The waves of energy it produced began creating freak waves and eating into the rock under the island. Three days later, Optimus Prime and Bumblebee visited Griffin Rock and enlisted the help of the Rescue Bots and their team to search for the device. Optimus and Blades eventually found it near the oil rig, and Optimus was able to disable it using the Matrix of Leadership.