Dust Diggers are nasty starfish-like sand dwellers with a central toothy maw. They have tough spine-covered tentacles and a bulbous central body which typically remains buried within the sand.
They lay in wait under the sand until unsuspecting travelers cross the sand above them, similar in behavior to ant lions. When this happens they reach up with their tentacles attempting to grab the victim and drag it to their center in order to consume them.
They are capable of moving slowly beneath the sand in search of surface prey.