Gibbering Mouther

Aberration · 2 hexes · SM +0 Gibbering Mouther (Enraged Eggplant; answers SRD 3.5, SRD 5.1)

A low mound of wet ochre and bruised violet protoplasm with six flesh stalks rising out of it, each ending in a toothed mouth. All six talk at once, and the babble makes it very hard to think straight near it. It spits acid and it flows rather than walks.

Attributes

ST15

DX10

IQ6

HT13

HP15

Will10

Per10

FP13

Basic Speed5.75

Basic Move3

Dodge8

DR2

Melee attacks

Usage	Level	Damage	Reach
Sharp TeethSharp Teeth (12): thrust 1d+1 cutting, Reach C.	12	thrust 1d+1 cutting	C
Spit AcidSpit Acid (12): 1d-1 corrosion. Ranged attack (Acc 3, Range 10), costs 1 FP.	12	1d-1 corrosion. Ranged attack (Acc 3, Range 10), costs 1 FP	—
GibberingAs soon as a mouther spots something edible, it begins a constant gibbering. When a creature hears this gibbering, it must roll a Fright Check using the Confusion table (GURPS Powers, p. 85). If a victim succeeds at his Fright Check, he will be unaffected by this ability for one hour.	—	—	—
Ground ManipulationA gibbering mouther can cause stone and earth in a 4-yard radius around it to become a morass akin to quicksand. This requires a Concentrate maneuver and costs 1 FP. Mired creatures are grappled with ST 12. Their only way to free themselves is to break free with a successful Quick Contest of ST. Softening stone requires two consecutive Concentrate maneuvers. This effect persists for 10 seconds.	—	—	4 yards
SpittleCorrosion Attack 1d-1 (Blockable, -5%; Costs Fatigue, 1 FP, -5%; Increased 1/2D, x10, +15%; One-Shot, -10%; Reduced Range, 1/10, -30%) Resolve as stated by the construction; the source gives no separate resolution text.	—	1d-1 corrosion	—

Traits (16)

• 360° Vision
• Amphibious
• Appearance (Monstrous; Universal)
• Constriciton Attack
• Disturbing Voice
• Extra Attack 5
• Extra Mouth 5
• Horizontal
• Immunity to Ground Manipulation
• Infravision
• Injury Tolerance (Damage Reduction 2; Limited, Crushing)
• Injury Tolerance (Homogenous, No Blood, No Eyes, No Head, No Neck)
• Invertebrate
• No Legs (Slithers)
• No Manipulators
• Social Stigma (Monster)

Skills (2)

• 12Brawling
• 12Innate Attack (Breath)

Notes

• GCS ancestry draft: gcs/gibbering-mouther.gct
• Source template total: 295 points.
• Library-rebuilt template total: 295 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.
• Size 2 hexes; Weight 200 lbs.

Encounter rating

CER31

Offense21

Protection10

Threat tierstandard

Appearing1

Wandering3

Tags

• srd-3-5
• srd-5-1
• aberration

GCS v5 downloads

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

Where this one came from

Source record

Gibbering Mouther

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/gibbering-mouther.gct
• Source template total: 295 points.
• Library-rebuilt template total: 295 points.
• CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
• Issue #5: 3 special ability construction(s) restored (Gibbering, Ground Manipulation, Spittle). 2 save-or-disable construction(s) are scored through the affliction term at the source's stated point cost, or at Binding ST where the source builds the ability as a Binding.
• CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 21, PR 10, CER 31, threat tier standard.
• Conversion baseline reported OR 10, PR 10, CER 20 (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 (solitary): average number appearing 1, wandering weight 3. 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.