Monstrous Centipede (Large)

Vermin · SM +1 Monstrous Centipede (Large) (Enraged Eggplant; answers SRD 3.5)

A heavy crimson-brown crawler shielded in soot-black plate, long enough to span a room, pouring over rubble and up walls without slowing. Blind and silent, it hunts the warmth of living things, and the serrated mandibles on its broad wedge of a head take a limb as easily as they take hold.

Attributes

ST15

DX10

IQ1

HT11

HP15

Will8

Per8

FP11

Basic Speed5.25

Basic Move5

Dodge8

DR3

Melee attacks

Usage	Level	Damage	Reach
MandiblesMandibles (11): thrust 1d cutting plus follow-up 1d-1 toxic (5 1-hour cycles, resisted by HT-1, -3 DX after loss of 2/3 HP), Reach C.	11	thrust 1d cutting plus follow-up 1d-1 toxic (5 1-hour cycles, resisted by HT-1, -3 DX after loss of 2/3 HP)	C

Traits (17)

• Acute Thermal Infrared Vision 4
• Blindness
• Clinging
• Cold-Blooded (50°)
• Double-Jointed
• High Pain Threshold
• Horizontal
• Infravision
• Injury Tolerance (No Brain, No Eyes, No Neck, No Vitals)
• No Legs (Slithers)
• No Manipulators
• Reduced Consumption 3 (Cast Iron Stomach)
• Restricted Diet (Carnivore)
• Short Lifespan 3
• Slippery 3
• Thermal Infrared Vision (Biological (Passive); Short-Range 1)
• Wild Animal with Mute

Skills (3)

• 11Brawling
• 12Stealth
• 12Tracking

Notes

• GCS ancestry draft: gcs/monstrous-centipede-large.gct
• Source template total: -158 points.
• Library-rebuilt template total: -158 points.
• CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
• Review attacks, special abilities, encounter frequency, treasure, grappling, and GCS modifiers before approval.
• Poison (follow-up on Bite): Toxic Attack 1d-1 (Cyclic, 1 hour, 5 cycles, Resistible, +50%; Follow-Up, Bite, +0%; Resistible, HT-1, -25%; Symptoms, 2/3 HP, -3 DX, +30%) Resolve as stated by the construction; the source gives no separate resolution text.

Encounter rating

CER15

Offense6

Protection9

Threat tierminor

Appearing6

Wandering4

Tags

• srd-3-5
• vermin

GCS v5 downloads

• ↓ Character sheet (.gcs)Open directly in GCS
• ↓ Ancestry template (.gct)Apply to any character

Where this one came from

Source record

Monstrous Centipede (Large)

Source system

gurps_4e_fan_conversion / author_permission

Released under

cc_by_4_0

Conversion

0.2.0-reviewed

Review status

approved

Credit

Original GURPS conversion by Enraged Eggplant, from Monsters (May 11, 2024); adapted and republished with permission.

Description

Written by Dungeons on Automatic, released under cc_by_4_0

• GCS ancestry draft: gcs/monstrous-centipede-large.gct
• Source template total: -158 points.
• Library-rebuilt template total: -158 points.
• CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
• Issue #5: 2 special ability construction(s) restored (Poison). No disabling construction on this record carries a cost the affliction term can score.
• CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 6, PR 9, CER 15, threat tier minor.
• Conversion baseline reported OR 7, PR 7, CER 14 (tier minor). The reviewed values come from the consumer CER implementation, which rounds damage once after the damage-type multiplier and credits ranged accuracy; the conversion baseline ceilinged the damage base first and ignored range.
• Encounter metadata derived (gregarious): average number appearing 6, wandering weight 4. Encounter metadata derived for 0.2.0 from the reviewed threat tier and creature class (appearing: minor 4 / standard 2 / major 1 / severe 1, forced to 1 for solitary classes — including swarms, which are a single multi-body creature — and raised to 6 for gregarious minor creatures; wandering weight: minor 4 / standard 3 / major 2 / severe 1). The fan-conversion source states no appearing-in-numbers or wandering values, so these are derived, not source mechanics.
• Lair, treasure, and grappling remain unpopulated in 0.2.0 by package policy: the authorized fan-conversion source states no lair, treasure, or grappling values, and review declines to invent them. See review/policy/0.2.0-empty-field-policy.md.
• Description text is original Dungeons on Automatic prose written from this record's own converted statistics and from the project's art direction for the creature. It is not derived from the authorized fan-conversion source, which states no creature descriptions, and not from any SRD. It carries its own authorship and CC BY 4.0 terms in the description field. See review/policy/description-policy.md.
• Review approved by automated-mechanical-review on 2026-07-26 (batch ee-2026-07-26-b4-special-mechanics); GCS fidelity check passed, DOA playability check passed.
• Special-mechanics record. Mechanics the CER path cannot price are named per record in review/reports/cer-audit.md rather than folded into the number, and encounter counts are capped where a save-or-disable attack is present.