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Gibbering Mouther - AI-generated fantasy Monster

Gibbering Mouther

The name “gibbering mouther” is a common description that became the creature’s name: witnesses mistook its babbling mass of mouths for a single speaking head. The description stuck, despite the fact that its many voices are not a language and its mouths do not share one mind.

Monsters
Medium aberration · CR 2 · Uncommon

Gibbering Mouther

A CR 2 aberrant bruiser drawn to the dragon remains Svarik is feeding upon, turning the feeding site into treacherous, living ground.
AC9
HP67/67
CR2
Init
STR
DEX
CON
INT
WIS
CHA
ConditionsNone

Combat

AC 9 · HP 67 · CR 2

Gibbering Mouther

Medium aberration (aberration), neutral
Armor Class9
Hit Points67 (9d8 + 27)
Speed
10 ft.,
Swim 10 ft.
STR
DEX
CON
INT
WIS
CHA
Immunities
Prone
Weaknesses
Slow movement,
Low Armor Class,
Limited reach
Senses
Darkvision 60 ft.,
Passive Perception 10
Languages
None
Challenge2
Proficiency Bonus+2
Gibbering save DC10
Blinding Spittle save DC10
Gibbering. If the mouther is able to take actions, each creature that starts its turn within 20 feet of it and can hear the mouther must succeed on a Wisdom saving throw. On a failure, the creature cannot take reactions until the start of its next turn and rolls a d8 to determine its behavior on that turn: on a 1–4, it does nothing; on a 5–6, it takes no action or bonus action and uses all its movement to move in a random direction; on a 7–8, it makes one melee attack against a randomly determined creature within reach or does nothing if it cannot make such an attack.
Aberrant Ground. The ground in a 10-foot radius around the mouther is doughlike difficult terrain. Any creature that starts its turn in that area and is standing on the ground must succeed on a Strength saving throw or have its speed reduced to 0 until the start of its next turn.

Actions

Bites. The mouther makes six bite attacks against one creature, or one bite attack against up to six creatures within 5 feet. Each attack is to hit, reach 5 feet, and deals 9 () piercing damage on a hit.
Blinding Spittle. Recharge 5–6. The mouther spits a blinding glob at a point it can see within 15 feet. Each creature within 5 feet of that point must succeed on a Dexterity saving throw or be blinded until the end of the mouther’s next turn. The glob also creates an area of ground liquefied by Aberrant Ground.
Role
Bruiser
Built for
Around level 2 for a party of four; adjust supporting enemies and terrain for larger or more experienced parties.

Notes for the game master

The six bites are separate attack rolls. A creature can be targeted more than once if it is within reach.
Gibbering and Aberrant Ground are traits; Blinding Spittle and Bites are actions.
The creature’s CR and baseline statistics follow the 5e gibbering mouther. Blinding Spittle is included as a requested feature.

Tactics

  1. Opening

    It begins concealed among the dragon remains or behind a ridge of bone, then surges toward the nearest intruder while its chorus fills the area.

  2. Mid-fight

    Use the difficult ground to pin prey in place, then concentrate bites on a creature that has fallen or become isolated.

  3. End of the fight

    When badly hurt, it keeps biting whichever prey is nearest and uses Blinding Spittle if it recharges. It does not retreat unless its feeding grounds are threatened by fire or a much larger predator.

  4. Retreat

    It has no coherent sense of self-preservation. If reduced to 10 hit points or fewer, it may crawl into a narrow crevice or beneath the remains, but it does not negotiate.

How it fights

Keep the mouther close to the dragon remains, where the difficult terrain matters.
Avoid having it attack a single low-level character with all six bites unless the intent is a lethal encounter.
Use Blinding Spittle to disrupt a clustered party, then close on characters who are separated or slowed.

Who it attacks first

Creatures close enough to threaten its feeding ground.
A creature isolated in its Aberrant Ground.
The nearest available prey, without regard for armor or apparent danger.

Works well with

Svarik can force characters to choose between stopping the feeding and avoiding the mouther’s difficult ground.
A second enemy that can push or restrain characters can keep them within the mouther’s bite range.

How to beat it

Ranged attacks and spells let characters harm it without entering its difficult terrain.
A successful DC 10 Wisdom saving throw protects a creature from Gibbering’s confusion for a round.
The spittle’s blindness lasts only until the end of the mouther’s next turn.
Its slow speed makes it vulnerable to being kited across open ground.

Ways to avoid a fight

Its chorus can be mistaken for voices from within the dragon remains, drawing curious creatures toward the feeding ground.
A character can bait it with fresh meat or carrion, potentially luring it away from an important path.
The mouther can be observed from a distance to learn which patches of ground are unstable and dangerous.

Ecology

A low, glistening mass of eyes, tongues, and half-formed mouths. Its surface ripples as faces push up from within, gasp, and sink back into the flesh.

Behavior

It follows strong scents and sounds, pressing its mass against prey and biting with every mouth it can bring to bear. Its babbling is a constant, discordant chorus rather than deliberate speech.

How it lives

Gibbering mouthers gather where old violence, strange magic, or decaying flesh offers nourishment. They consume almost anything organic and leave their feeding grounds slick and warped.

Lair

It has no constructed lair. It settles into hollows among carcasses, refuse, or the bones of larger creatures.

Habitat
A feeding ground among the remains of a dragon, especially a place where old blood and unnatural energy have soaked into the earth.

Signs that it is near

A chorus of wet, overlapping babble with no clear source.
Slick, pitted ground that seems to shift underfoot.
Scattered bones and scraps of flesh fused into the soil.

Tags

aberration,
bruiser,
dragon-remains,
encounter-monster

Lore

The name “gibbering mouther” is a common description that became the creature’s name: witnesses mistook its babbling mass of mouths for a single speaking head. The description stuck, despite the fact that its many voices are not a language and its mouths do not share one mind.

What drives it

Feed, driven by an endless and indiscriminate hunger.

After the fight

When killed, the creature collapses into a bubbling heap. Its many mouths continue to whisper for a few moments, sometimes repeating the last words spoken near it.

Variants

A starved mouther has 45 hit points and flees when reduced to 15 hit points or fewer.
A dragon-fed mouther has 76 hit points; its Blinding Spittle leaves behind a 5-foot-radius patch of Aberrant Ground until the end of the next round.

Hooks

Plot hooks

Svarik has been feeding dragon remains to the mouther, and the creature is growing bolder as it becomes accustomed to easy meals.
One of the voices in its babble repeats a phrase spoken by a missing traveler, hinting that the mouther consumed them.
The dragon’s remains have changed the mouther, and its feeding ground is beginning to spread toward a nearby settlement.

How to use it

Use the mouther as the close-range bruiser while Svarik or another creature creates a separate threat.
Place the dragon remains so they create lanes and obstacles, but leave at least one clear approach for characters who want to engage at range.
For a party of four characters around level 2, let the mouther’s difficult terrain and confusion create pressure without adding multiple other high-damage enemies.

Treasure

Partially digested coins and small valuables can be found among the remains of its meals.
The dragon remains may contain the real treasure; the mouther itself keeps no hoard.

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