Animal · 2 hexes · SM +1 Constrictor Snake [Monsters on Automatic, SRD coverage: snakes; answers Constrictor Snake (SRD 5.1); Constrictor Snake (SRD 3.5)]
Three metres of muscle that has never needed venom. It lies along a branch with its head down at head height and waits for something warm to pass under, and the whole encounter turns on the first second — before the coils, it is a snake; after them, it is arithmetic.
Attributes
ST12
DX12
IQ3
HT12
HP12
Will8
Per10
FP12
Basic Speed6
Basic Move6
Dodge9
DR0
Melee attacks
| Usage | Level | Damage | Reach |
|---|---|---|---|
| BiteBite (14): 1d-2 cutting, Reach C. Backward-curved teeth that take hold rather than cut. The bite is how the coils arrive. | 14 | 1d-2 cutting | C |
| ConstrictConstrict: Reach C. Once it has hold, the coils go on. No attack roll and no defence: win a Quick Contest of ST each second or take crushing damage and lose the breath to shout with. | — | — | C |
Traits (14)
- Amphibious
- Bestial
- Cannot Speak
- Cold-Blooded
- Constriction Attack
- Discriminatory Smell
- Double-Jointed
- Injury Tolerance (No Neck)
- Night Vision 3
- No Fine Manipulators
- No Legs (Slithers)
- Restricted Diet (Carnivore)
- Sharp Teeth
- Vibration Sense (Air)
Skills (3)
- 14Brawling
- 15Stealth
- 11Tracking
Notes
- GCS ancestry draft: gcs/constrictor-snake.gct
- Independent build total: -22 points of racial traits plus 20 points of racial skills.
- Answers the SRD heading(s): Constrictor Snake (SRD 5.1); Constrictor Snake (SRD 3.5). Only the creature identity is taken from the SRD; the GURPS statistics, ratings and prose are this project's own work and reproduce no SRD text.
- Typical Stats, damage and ratings are derived from the racial template, not authored beside it, so the sheet and the stat block cannot disagree.
- Body mass used to scale this build: 30 kg. ST, Size Modifier and DR are checked against it; see the gurps-animal-sanity-check skill for the bands.
- Movement: ground Move 6 (primary); water Move 6. The published Move is the primary medium's cruising Move; sprint figures are stated here and not folded into it.
- Treasure and grappling are not authored for this batch and ship as explicit nulls; `lair` carries a short habitat note, because where a wandering animal dens is an encounter fact rather than a loot one.
- Three metres, which is the SM +1 row.
- ST from Basic Lift: the coils have to beat a struggling animal of its own mass, which is what constriction is.
- The coils are priced by binding ST rather than by damage, because they do their work by holding rather than by wounding.
- Added after a post-hoc comparison against independent GURPS fan conversions of this creature: Double Jointed; the Tracking skill, which a creature with Discriminatory Smell should always have. The comparison surfaced the gap; the build is still ours.
Encounter rating
CER24
Offense20
Protection4
Threat tierminor
Appearing1
Wandering4
Tags
- monsters-on-automatic
- ai-generated
- doa-authored
- srd-5-1
- srd-3-5
- animal
- reptile
- ambusher
- jungle
- swamp
- wandering-encounter
GCS v5 downloads
Where this one came from
- Source record
- Constrictor Snake [Monsters on Automatic, SRD coverage: snakes]
- Source system
- doa_fixture / doa_authored
- Released under
- cc_by_4_0
- Conversion
- 0.1.0-srd-independent-build
- Review status
- approved
- Credit
- Monster statistics, ratings and description prose by Monsters on Automatic; AI-generated first draft, project-reviewed, released under CC BY 4.0.
- Description
- Written by Dungeons on Automatic, released under cc_by_4_0
- Independently authored GURPS build. The SRD supplies the creature identity this record answers to and nothing else: no SRD statistics, wording or presentation is reproduced, and no third-party GURPS conversion was used as an input.
- Answers the SRD heading(s): Constrictor Snake (SRD 5.1); Constrictor Snake (SRD 3.5).
- Racial template: -22 points across 20 traits, plus 3 racial skill(s) worth 20 points.
- Every trait is drawn from the project's controlled GURPS vocabulary in scripts/srd/trait-library.mjs, which carries the page reference and published cost for each entry.
- sourceSystem is recorded as doa_fixture because that is the package contract's value for project-authored material; the SRD headings this record answers are in provenance.coversSourceIdentities.
- Ratings are recomputed through the consumer CER path on every build, so a mechanics change cannot leave a stale rating behind.
Copyright 2026 Monsters on Automatic. GURPS-compatible monster statistics, ratings and prose authored for this package as an AI-generated first draft under project review. No SRD text, and no third-party GURPS conversion, is reproduced. Portrait and tokens are AI-generated original art. Sources and credits.