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Surnoch CR 9

XP 6,400
N Large animal
Init +6; Senses low-light vision, sense through (vision [stone only]); Perception +17


HP 145
EAC 22; KAC 24
Fort +13; Ref +13; Will +8
Immunities acid


Speed 30 ft., burrow 30 ft.
Melee bite +21 (2d10+12 P)
Ranged acid jet +18 (3d6+9 A)
Space 10 ft.; Reach 10 ft.
Offensive Abilities corrosive spines


Str +3; Dex +6; Con +4; Int –4; Wis +2; Cha +0
Skills Stealth +22, Acrobatics +17
Other Abilities no breath, tunnel swiftness


Acid Jet (Ex)

As a standard action, a surnoch can spew a stream of acid from one of its spines. This attack has the line weapon special property and a range increment of 60 feet.

Corrosive Spines (Ex)

A creature that begins its turn grappled by a surnoch automatically takes 3d6+9 acid and piercing damage from the acid dripping from its spines.

Tunnel Swiftness (Ex)

When moving in a tunnel that it or another surnoch has burrowed, a surnoch moves five times its speed and doesn’t gain the flat-footed condition when it takes the run action. In addition, it can hustle in such a tunnel for 3 hours each day before it begins to take nonlethal damage.


Environment any underground or vacuum
Organization solitary or pair

Surnochs are burrowing creatures that live in and devour the crusts of asteroids and small moons. Jaws that function like grinders and glands at the bases of their many spines that exude acid to liquefy rock allow these wormlike creatures to create labyrinthine tunnels in their domains, through which they can move with uncanny speed. The color of a surnoch’s hide is similar to that of the rock it burrows through. A typical surnoch is 15 feet long and weighs over 1,200 pounds.

At its leading end, a surnoch has a deep funnel of a mouth lined with numerous small orifices. At the back of the funnel is the grasping jaw with which it brings material into the funnel to be sorted. While the grasping jaw looks ferocious, the real danger of the maw lies in the fact that it is essentially a giant, churning mining machine.

The numerous small orifices that line the interior of a surnoch’s mouth allow matter of different consistencies to stream through as the creature chews and melts its way through rock and stone. Nutrient-rich material is routed to the surnoch’s digestive tract, while much of the rest of it is broken down into various acids by the surnoch’s caustrolizer system, a series of organs unique to the creature that act like a chemical factory. A surnoch has an innate sense of which minerals its body requires the most of and has evolved a kind of X-ray vision that it allows it to find these foodstuffs, even through several feet of rock.

After consuming some of its favored elements, a surnoch excretes condensed and hardened forms of the minerals it can neither digest nor turn into acid.

A feeding surnoch leaves tunnels full of strange alloys and amalgams in its wake, some which can’t be created through any other process.

The castings that line a surnoch tunnel have an ethereal, shimmering beauty, like mother-of-pearl arranged in strange symmetries. Many of the endemic alloys are useful to technological races, so occasional expeditions purposefully seek out asteroids mined by surnochs to harvest the beasts’ unusual leavings. The greatest connoisseurs of these castings are the sarcesians, who turn the beautiful substances into jewelry and elaborate sculptures.

Approaching surnoch territory to harvest such material, or for any other reason, is incredibly dangerous. Surnochs aren’t territorial but they are ravenous. Almost any technology that can transport a visitor to a surnoch-infested asteroid contains the elements that a surnoch consumes. While powered armor and electronic items are the most likely to draw hungry surnochs, most refined material has a reasonable chance of looking like dinner. Those who make their livings harvesting surnoch castings primarily use equipment created from materials that have already been vetted as uninteresting to the creatures.

Surnochs are found mainly in asteroids and in the larger rocks of planetary rings, fully sorting and digesting them before drifting through space to the next host. Surnochs are sometimes seen on small moons, especially the shepherd moons, and the discovery of surnoch remains on larger moons has given scientists a fairly precise understanding of how much gravity the beasts can withstand.

A surnoch reproduces once every decade or so, in a process where a smaller creature slowly grows from the surnoch’s hide over the course of a month. This parthenogenesis is often preceded by a period of gorging by the surnoch, which is difficult to differentiate from the creature’s normal voracious feeding behavior. A surnoch feasting in this manner tends to consume minerals with natural radiation (such as uranium), though rocky areas that have been bombarded with nuclear weapons also tend to draw a surnoch ready to reproduce. Once the creature’s bud fully sprouts, it detaches with a burst of acid and the newly formed surnoch is ready to begin feeding. Luckily for the galaxy, at least a third of surnoch parents immediately consume their offspring immediately following this “birth” for reasons that continue to baffle biologists to this day.

While most surnochs are solitary creatures, two will occasionally travel and feed together, often working their way through parallel tunnels to consume different minerals. While to outsiders it might seem like the two surnochs are deliberately working in concert to cause the most destruction, the truth is far less sinister. The two creatures have been brought together by unknown electromagnetic symbols echoing off their thick hides and attuning their appetites to crave distinct fare.

And just as quickly as the pair came together, some mysterious trigger can set them against one another in a tumbling mass of spines and acid that is usually even more devastating than the two surnochs feeding peacefully.

A handful of survivors from a recent surnoch attack a production facility claim that their factory was targeted by a rival company that placed a losing bid for the rights to their asteroid several years before. While their allegations have been dismissed as paranoid ravings, independent investigators found strange computer chips in the brain of what they believe is the corpse of the attacking surnoch.

Acid Lancer

In addition to collecting the valuable composites the creature leaves behind, some entrepreneurs enter surnochs’ territory to hunt and kill them for their acid-producing glands and spines. These components can be made into heavy weapons known as acid lancers, which shoot jets of caustic fluid. A wielder of an acid lancer can squeeze the gland located near the trigger to give her next shot an extra boost of damaging acid. Acid lancers use a special synthetic acid called caustrol for ammunition, which has the same price and comes in the same size containers as petrol.

Acid Lancers (Two-Handed Heavy Weapons) Uncategorized Level Price Damage Range Critical Capacity Usage Bulk Special

Acid lancer, corroder-class 4 2,000 2d4 A 30 ft. Corrode 1d4 20 caustrol 4 2 Analog, boost 1d4, line, unwieldy

Acid lancer, melter-class 9 13,000 3d4 A 30 ft. Corrode 2d4 20 caustrol 5 2 Analog, boost 1d6, line, unwieldy

Acid lancer, liquefier-class 14 75,000 8d4 A 50 ft. Corrode 4d4 40 caustrol 8 2 Analog, boost 1d8, line, unwieldy

Acid lancer, disintegrator-class 19 550,000 8d8 A 50 ft. Corrode 6d4 40 caustrol 10 2 Analog, boost 1d10, line, unwieldy

Section 15: Copyright Notice

Starfinder Alien Archive © 2017, Paizo Inc.; Authors: John Compton, Adam Daigle, Crystal Frasier, Amanda Hamon Kunz, Jason Keeley, Jon Keith, Steve Kenson, Isabelle Lee, Lyz Liddell, Robert G. McCreary, Mark Moreland, Joe Pasini, F. Wesley Schneider, Owen K.C. Stephens, James L. Sutter, and Josh Vogt.