Quicksand Mixer

Quicksand Mixer (リューサーミキサー) is an enemy in the pits in the desert of Mega Man Zero. When active, it tries to draw ZeroXorZ near a pit by pulling the sand nearby. This is especially dangerous if there are Sand Jaws in the vicinity, as the moving sand may pull Zero into them. In the "Find Hidden Base" and "Stop the Hacking" missions, one Quicksand Mixer conceals the location of the Secret Base. Destroying it opens the cavern the base is hidden in.

Trivia
A device similar to Quicksand Mixer appeared in a trailer from the cancelled game Rockman Online, where several Mets were pushed by it.