Home >Game Mastering >Bestiary >Creatures by Type >Vermin >

Chain Worm

Chain Worm CR 12

This creature looks like a massive centipede with a bright, reflective silver carapace. Its legs are dull silver and its oversized mandibles are black. A dull black stinger is located at the rear of its body.

XP 19,200
N Large vermin
Init +4; Senses darkvision 60 ft., blindsense (vibration) 60 ft.; Perception +22


EAC 26 KAC 28
Fort +16, Ref +14, Will +11
Defensive Abilities elusive


Speed 30 ft.; climb 20 ft.
Melee bite +25 (6d4+20 P plus grab) or tail sting +22 (6d4+20 P plus chain worm poison)
Offensive Abilities trilling


Str +8, Dex +4, Con +5, Int —, Wis +2, Cha –3
Skills Athletics +27, Stealth +22
Other Abilities mindless


Elusive (Su)

Chain worms are rarely encountered unless they wish it. As a full action while in darkness or shadows, a chain worm can move up to its run speed (120 ft.) without leaving any trace of its passing. An elusive chain worm gains a +40 circumstance bonus to its Stealth check.

In addition, except when in combat, a chain worm is considered to be under the effects of a nondetection spell (caster level 12th).

Trilling (Ex)

By rapidly vibrating its carapace, a chain worm emits a high-pitched trilling sound that stuns and deafens all creatures within range. All living creatures within 30 feet that hear it must succeed on a DC 19 Fortitude save or be Stunned”>stunned for 1d4 rounds and deafened for 24 hours.


Environment any land or underground
Organization solitary, pair, or pack (3–5)

Chain worms are subterranean predators with an insatiable appetite for meat. The creature has a particular fondness for dwarf, gnome, and bugbear flesh. Chain worms often build their nests near communities of these creatures, so their food supply is readily available. Though not particularly fond of cold or damp weather, a chain worm can be found just about anywhere as its chitinous body offers it ample protection against less than friendly environments.

A chain worm’s nest is a hole or tunnel littered with rocks, bones, refuse, and debris, and often located on a rocky outcropping or ledge making it inaccessible to most creatures. Any valuables found in its lair are simply the remains of a previous meal that the chain worm couldn’t digest or didn’t bother eating.

Chain worms stand nearly 6 feet tall and are about 10 feet long with silver carapaces and dull silver legs. Their heads sport oversized dull black mandibles that constantly drip brownish-gray saliva. Its tail stinger is about a foot long and black (as it ages, its tail stinger changes to dull gray).

A chain worm lies in wait for a meal, attacking whenever its target comes within range. It attacks using either a nasty bite or by curling its rear body forward and stinging with its tail stinger. If a chain worm grabs a foe in its mandibles, it holds it and repeatedly stings it until it is dead.

Section 15: Copyright Notice

Alien Bestiary (Starfinder) © 2018, Legendary Games; Lead Designer: Jason Nelson. Authors: Anthony Adam, Kate Baker, John Bennet, Eytan Bernstein, Robert Brookes, Russ Brown, Duan Byrd, Jeff Dahl, Robyn Fields, Joel Flank, Matt Goodall, Robert J. Grady, Jim Groves, Steven T. Helt, Thurston Hillman, Tim Hitchcock, Nick Hite, Daniel Hunt, Mike Kimmel Marshall, Isabelle Lee, Jeff Lee, Lyz Liddell, Jason Nelson, Richard Pett, Tom Phillips, Alistair J. Rigg, Alex Riggs, Wendall Roy, Mike Shel, Neil Spicer, Todd Stewart, Russ Taylor, Rachel Ventura, Mike Welham, George Loki Williams, Scott Young.