This creature looks like a man-sized sandy brown starfish with five long tentacles ringing a central maw lined with sharpened teeth and fangs.
Dust Digger CR 4
Speed 10 ft., burrow 10 ft.
Melee 5 tentacles +8 (1d6+3 plus grab) and bite +8 (2d6+3)
Space 10 ft.; Reach 10 ft. (5 ft. with bite)
Special Attacks sinkhole, swallow whole (1d6+3 plus 1d8 acid damage, AC 13, 10 hp)
Str 16, Dex 10, Con 13, Int 2, Wis 11, Cha 10
Base Atk +3; CMB +7 (+11 grapple); CMD 17 (can’t be tripped)
Feats Improved Natural Attack (bite), Skill Focus (Perception), Skill Focus (Stealth)
Skills Perception +8, Stealth +5 (+17 sandy terrain); Racial Modifiers +12 Stealth in sandy terrain
SQ earth glide
A dust digger can glide through sand, loose soil, or other loosely packed earth as easily as a fish swims through water. Its burrowing leaves behind no tunnel or hole, nor does it create any ripple or signs of its presence. A move earth spell cast on an area containing a burrowing dust digger flings the creature back 30 feet, stunning it for 1 round unless it succeeds on a Fortitude save.
A buried dust digger can deflate its body as a free action, causing the sand above it to slide toward its maw. A creature standing on a space occupied by a buried dust digger when it deflates is immediately subjected to the dust digger’s tentacle attacks.
Environment warm desert
Organization solitary, gang (4–8), or colony (9–20)
A dust digger inflates its body with air, buries itself under a thin lair of sand or dirt, and waits for its prey to pass nearby. When a living creature walks over a dust digger, the creature deflates its body and folds its arms around the victim, attempting to shove the prey into its mouth.