Mythic Gibbering Mouther

Mythic Gibbering Mouther CR 6/MR 2

XP 2,400
N Medium aberration (mythic, mythos)
Init +4; Senses all-around vision, darkvision 60 ft.; Perception +12


AC 22, touch 14, flat-footed 18 (+4 Dex, +8 natural)
hp 62 (4d8+44)
Fort +8, Ref +5, Will +5
Defensive Abilities amorphous; DR 5/bludgeoning and epic; Immune critical hits, precision damage


Speed 10 ft., swim 20 ft.
Melee 6 bites +8 (1d4+4 plus grab)
Special Attacks beckoning gibber, blood drain, caustic spittle (+7 ranged touch), enduring insanity, engulf (6d4+6 damage plus 2 Con damage, AC 14, hp 6), gibbering, ground manipulation, mythic power (2/day, surge +1d6)


Str 10, Dex 19, Con 24, Int 4, Wis 13, Cha 12
Base Atk +3; CMB +3 (+7 grapple); CMD 17 (can’t be tripped)
Feats Weapon Finesse, Weapon Focus (bite)
Skills Perception +12, Swim +8; Racial Modifiers +4 Perception
Languages Aklo


All-Around Vision (Ex)

A mythic gibbering mouther sees in all directions at once. It cannot be flanked.

Amorphous (Ex)

A mythic gibbering mouther’s body is malleable and shapeless. It is immune to precision damage (like sneak attacks) and critical hits and can move through an area as small as one-quarter its space without squeezing or one-eighth its space when squeezing .

Beckoning Gibber (Su)

Creatures beginning their turn within 120 feet of a mythic gibbering mouther while it is gibbering must succeed on a DC 13 Will save each round or be compelled to spend a move action moving toward it. Confused creatures that are compelled to take no action or to Attack themselves automatically fail their save against this effect during that round.

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+4 points of bite damage and 1 point of Constitution damage as it drains its victim’s blood.

Caustic Spittle (Ex)

Each round as a free action, a mythic gibbering mouther can emit a stream of acidic spittle at one target within 30 feet. On a successful Attack, the target is blinded for 1d4 rounds unless he succeeds on a DC 19 Fortitude save and takes 1d6 acid damage this round and the next round. The save DC is Constitution-based. This ability replaces the spittle ability of a normal gibbering mouther.

Enduring Insanity (Su)

When a creature is confused by a mythic gibbering mouther’s gibbering ability, the mouther may expend one use of its mythic power to extend the duration of that creature’s confusion to 1 minute instead of 1 round. A creature targeted with this ability cannot be affected by this ability more than once per day by the same mythic gibbering mouther.

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)

As a free action, a gibbering mouther can emit 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. This is a mind-affecting compulsion insanity effect. A creature that saves cannot be affected by the same mouther’s gibbering for 24 hours. The save DC is Charisma-based.

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 away from 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
Treasure standard

This horrid mass of eyes, mouths, and formless flesh stares in all directions, its countless maws yammering ceaselessly as it forms into faces, vestigial limbs, and atrophic appendages that melt back into the protoplasm of the creature’s mass as quickly as they are created.

Disgusting, loathsome, and hungry—these are the only words that properly describe this horrifying cousin of the gibbering mouther. A foul beast that lurks in underground caves, sewers, and nightmares, mouthers have no societal, ecological or religious significance other than their ability to drive those that listen to them mad. They do tend to aggregate in groups more often than their solitary kin, and the echoing interplay of each creature’s deranged babbling is what gives these creatures their name.

Section 15: Copyright Notice

Mythos Monsters (PF1) © 2022, Legendary Games; Authors Jason Nelson, Jim Groves, Jonathan Keith, Tom Phillips, Alistair J. Rigg, and Greg A. Vaughan

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