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Gibbering Mouther

Gibbering Mouther CR 5 (Combatant)

XP 1,600
N Medium aberration
Init +3; Senses darkvision 60 ft.; Perception +11
Aura gibbering (60 ft., Will DC 13)


HP 70
EAC 17; KAC 19
Fort +7; Ref +7; Will +6; special
Defensive Abilities amorphous, unflankable; DR 5/bludgeoning; Immunities critical hits, precision damage


Speed 10 ft., swim 20 ft.
Melee bite +14 (1d6+7P plus grab)
Ranged spittle +11 (1d6+5A plus burn eyes)
Offensive Abilities blood drain, engulf (1d6+7A, EAC 17, KAC 15, 17 HP), gibbering, ground manipulation


Str +2; Dex +3; Con +5; Int -3; Wis +2; Cha +1
Skills Athletics +16, Intimidate +11, Survival +11
Languages Aklo
Other Abilities compression


Blood Drain (Ex)

On a successful grapple check after grabbing, several of the creature’s mouths attach to its target. Each round it maintains its grapple, its mouths automatically deal 1d4 points of bite damage and 1 point of Constitution damage as it drains its victim’s blood.

Burn Eyes (Ex)

Each round as a swift action, a gibbering mouther can emit a stream of acidic spittle at one target within 30 feet. A creature that takes damage from a gibbering mouther’s spittle must make a DC 13 Fortitude save or be dazzled for 1d4 rounds.

If the creature critically fails the saving throw, they are blinded for 1d4 rounds.

Engulf (Ex)

This ability functions as swallow whole, except for the following changes. An engulfed creature is trapped in the gibbering mouther’s body, where several of its mouths continue to feed and drain blood. A gibbering mouther can engulf only one foe of its size or smaller at a time. If an engulfed creature cuts its way free (the mouther’s damage reduction still applies to those inside), the mouther simply flows together again and can still use its engulf attack.

Gibbering (Su)

A gibbering mouther constantly emits a cacophony of maddening sound. All creatures other than gibbering mouthers within 60 feet must succeed on a DC 13 Will save or be confused for 1 round. On a success, they are temporarily immune to the same mouther’s gibbering for 1 minute. This is a mind-affecting compulsion insanity effect.

Ground Manipulation (Su)

At will as a standard action, a gibbering mouther can cause stone and earth under its body to grow soft and muddy. The ground remains muddy for 1 minute after the mouther moves off of the location. A gibbering mouther can move through these areas with ease, but other creatures treat them as difficult terrain.


Environment any underground
Organization solitary

A gibbering mouther is a disgusting mass of loose flesh, watery eyes, and drooling, biting mouths. These insane aberrations live only to feed and to create a noisome cacophony that drives others to become insane as well.

A gibbering mouther appears to be an amorphous mass of flesh with multiple eyes and mouths. The mouths constantly gibber or drool an acidic spittle.

This spittle softens the ground through which a gibbering mouther travels, leaving it muddy and slick.

These aberrations exist only to feed on the flesh and blood of others. A mouther will ungulate towards a living creature and engulf it within its amorphous body. The multiple mouths then drink of the blood of the unfortunate victim.

Section 15: Copyright Notice

Starfarer Adversaries: Legacy Bestiary © 2020, Rogue Genius Games LLC; Author: Jacob E. Blackmon; Additional work by: Owen K.C. Stephens. Produced by Owen K.C. Stephens.