Creature Reference Back to Creatures

Gibbering Mouther

Medium · Aberration · CR 2 · Chaotic Evil

Source. Monstrous Menagerie

67 (9d8+27)

Ability Scores

Core attributes and their modifiers.

STR

DEX

-1

CON

INT

-4

WIS

CHA

-2

Overview

Category Monsters

Size Medium

Type Aberration

Alignment Chaotic Evil

XP 450

Initiative Bonus -1

Movement

Walk 20 ft (6.1 m)

Swim 20 ft (6.1 m)

Climb 10 ft (3 m)

Crawl 10 ft (3 m)

Senses

Darkvision 60 ft (18.3 m)

Passive Perception 10

Resistances & Immunities

Damage Resistances

psychic

Condition Immunities

prone

Traits

Amphibious

The mouther can breathe air and water.

Gibbering Mouths

The mouther babbles constantly. A living non-aberration creature that starts its turn within 30 feet and can hear its gibbering makes a DC 10 Intelligence saving throw. On a failure, the creature is confused until the start of its next turn.

Reality Eater

The ground within 15 feet of the mouther is the consistency of sucking mud and is difficult terrain to all creatures except the mouther. Each non-aberrant creature that starts its turn in the area or enters it for the first time on its turn makes a DC 10 Strength saving throw. On a failure, its Speed is reduced to 0 until the start of its next turn.

Actions

Bite

+2 to hit, reach 5 ft (1.5 m). Hit: 2d6 piercing damage.

Melee Weapon Attack: +2 to hit, reach 5 ft., one creature. Hit: 7 (2d6) piercing damage and the target makes a DC 10 Strength saving throw falling prone on a failure. If the target is killed by this attack it is absorbed into the mouther.

Multiattack

The mouther makes two bite attacks.

Bonus Actions

Blinding Bile

Recharge 5–6

Ranged Weapon Attack: +2 to hit, range 20/60 ft., one creature. Hit: 3 (1d6) acid damage, and the target is blinded until the end of the mouthers next turn.

About Gibbering Mouther

Gibbering Mouther is a medium aberration with a Challenge Rating of 2. It has a chaotic evil alignment.

In combat, this creature maintains an Armor Class of 9 and possesses 67 hit points (derived from 9d8+27).

GM Tips: Using Gibbering Mouther

1 tips available

When using Gibbering Mouther in your D&D 5e campaign, consider these tactical approaches:

Aquatic Combat: This creature can swim at 20 ft. It has advantage in water environments. Consider fighting on land or using water-based spells against it.

Player Guide: Facing Gibbering Mouther

1 strategies available

When your party encounters this creature, keep these strategies in mind:

Aquatic Combat Defense: This creature can swim at 20 ft! It has advantage in water. Fight on land if possible. Use 'Control Water' or drain water sources to limit its mobility.

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 2.

Solo Encounter:

A single character of level 4 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 600 XP
Hard: 900 XP
Deadly: 1,200 XP

Based on D&D 5e Dungeon Master's Guide encounter building guidelines. CR roughly equals party level for medium encounters.

Frequently Asked Questions

What is the challenge rating of Gibbering Mouther?: Gibbering Mouther has a Challenge Rating of 2, making it appropriate for parties of level 2.0.
What type of creature is Gibbering Mouther?: Gibbering Mouther is a Medium Aberration, which affects how certain spells and abilities interact with it.