Gibbering Mouther
Medium Aberration · · CR 2
- Aberration
- Medium
- Tier 1
As a medium aberration (chaotic neutral), Gibbering Mouther carries CR 2. Common in underground and planar environments. Sourced from Monster Manual (5e 2014) and Monster Manual (5.5e 2024).
Stat Block
- Challenge Rating
- 2
- Type
- Aberration
- Size
- Medium
- Alignment
- —
- Speed
- —
- Habitats
- Underground, Planar
- Sources
- Monster Manual (5e 2014), Monster Manual (5.5e 2024), Flee, Mortals!
Ecology
Gibbering mouthers dwell in deep underground caverns, abandoned dungeons, and aboleth temples where the boundary between dream and matter grows thin. They feed by digesting prey through pseudopod-mouths, breaking flesh into pulpy ooze through external enzymatic action. They reproduce by budding when sufficiently large, splitting into two smaller mouthers. They have no need for sleep, water, or fresh air, persisting indefinitely in stagnant darkness.
Behaviour
Gibbering mouthers are mindless aberrations driven by a hunger no mortal can comprehend. They speak constantly in fragments of dead languages, the result of absorbing memories from devoured prey. They cannot form plans or learn from defeat, but they react to vibration and warmth with relentless aggression. They show no fear, no instinct for self-preservation, and no recognition of other mouthers as kin. They simply gibber and feed.
Origin
Sages believe gibbering mouthers were spawned by mad gods in the early ages, byproducts of failed creation experiments. Aboleth lore claims responsibility, saying the first mouthers were the discarded thoughts of a primordial dreaming god trapped in stone. Whatever the truth, mouthers are ancient, predating most civilizations, and continue to seep through cracks in the world wherever sanity grows thin and the deep dark touches the upper world.
Related Monsters
Frequently Asked Questions about Gibbering Mouther
- What is the challenge rating of Gibbering Mouther?
- Gibbering Mouther is rated CR 2. The rating works against tier-1 parties.
- What type of creature is Gibbering Mouther?
- The bestiary type for Gibbering Mouther is aberration, medium size.
- Where does Gibbering Mouther live?
- Gibbering Mouther is at home in Underground, Planar.