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Elasmosaurus

Animal · major threat

Elasmosaurus bestiary portrait
Elasmosaurus top-down encounter tokenElasmosaurus top-down flat-top hex token

Animal · 12 hexes · SM +5 Elasmosaurus [Monsters on Automatic, SRD coverage: dinosaurs and prehistoric beasts; answers Elasmosaurus (SRD 3.5)]

Fourteen metres, and eight of them are neck. It swims under a boat and comes up alongside, and the head arrives from a direction nobody was watching. The body is barely a threat; the reach is the entire animal, and there is no useful distance from it short of shore.

Attributes

ST45
DX11
IQ3
HT13
HP45
Will9
Per10
FP13
Basic Speed6
Basic Move6
Dodge9
DR2

Melee attacks

UsageLevelDamageReach
BiteBite (13): 5d-1 cutting, Reach C,4. Delivered at the end of a neck longer than the rest of the animal. It can take someone off a deck without the body ever entering the water.135d-1 cuttingC,4

Traits (13)

  • Amphibious
  • Bestial
  • Breath-Holding 3
  • Cannot Speak
  • Cold-Blooded
  • Damage Resistance 2 (Tough Skin)
  • Enhanced Move 0.5 (Water)
  • Horizontal
  • Nictitating Membrane 2
  • No Fine Manipulators
  • Pressure Support 1
  • Restricted Diet (Carnivore)
  • Sharp Teeth

Skills (2)

  • 13Brawling
  • 14Swimming

Notes

  • GCS ancestry draft: gcs/elasmosaurus.gct
  • Independent build total: -3 points of racial traits plus 6 points of racial skills.
  • Answers the SRD heading(s): Elasmosaurus (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: 2000 kg. ST, Size Modifier and DR are checked against it; see the gurps-animal-sanity-check skill for the bands.
  • Movement: ground Move 6; water Move 6, 9 at a sprint (primary). 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.
  • Fourteen metres, which is the SM +5 row — the top of the published table's practical range for a creature at a table.
  • Reach is the point of the build. The bite is stated at reach C,4 because the neck, not the jaws, is what makes this dangerous.

Encounter rating

CER72
Offense31
Protection41
Threat tiermajor
Appearing1
Wandering2

Tags

  • monsters-on-automatic
  • ai-generated
  • doa-authored
  • srd-3-5
  • animal
  • reptile
  • dinosaur
  • aquatic
  • predator
  • prehistoric
  • open-water

GCS v5 downloads

Where this one came from
Source record
Elasmosaurus [Monsters on Automatic, SRD coverage: dinosaurs and prehistoric beasts]
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): Elasmosaurus (SRD 3.5).
  • Racial template: -3 points across 19 traits, plus 2 racial skill(s) worth 6 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.