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Gibbering Mouther

Medium · Aberration · CR 2 · Neutral

Source. 5e 2014 Rules

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 Neutral

XP 450

Initiative Bonus -1

Movement

Walk 10 ft (3 m)

Swim 10 ft (3 m)

Climb 5 ft (1.5 m)

Crawl 5 ft (1.5 m)

Senses

Darkvision 60 ft (18.3 m)

Passive Perception 10

Resistances & Immunities

Condition Immunities

prone

Environments

Caves Laboratory Sewer Astral Plane Underworld

Traits

Aberrant Ground

The ground in a 10-foot radius around the mouther is doughlike difficult terrain. Each creature that starts its turn in that area must succeed on a DC 10 Strength saving throw or have its speed reduced to 0 until the start of its next turn.

Gibbering

The mouther babbles incoherently while it can see any creature and isn't incapacitated. Each creature that starts its turn within 20 feet of the mouther and can hear the gibbering must succeed on a DC 10 Wisdom saving throw. On a failure, the creature can't take reactions until the start of its next turn and rolls a d8 to determine what it does during its turn. On a 1 to 4, the creature does nothing. On a 5 or 6, the creature takes no action or bonus action and uses all its movement to move in a randomly determined direction. On a 7 or 8, the creature makes a melee attack against a randomly determined creature within its reach or does nothing if it can't make such an attack.

Actions

Bites

Cost 1

+2 to hit, reach 5 ft (1.5 m).

Melee Weapon Attack: +2 to hit, reach 5 ft., one creature. Hit: 17 (5d6) piercing damage. If the target is Medium or smaller, it must succeed on a DC 10 Strength saving throw or be knocked prone. If the target is killed by this damage, it is absorbed into the mouther.

Blinding Spittle

Cost 1

The mouther spits a chemical glob at a point it can see within 15 feet of it. The glob explodes in a blinding flash of light on impact. Each creature within 5 feet of the flash must succeed on a DC 13 Dexterity saving throw or be blinded until the end of the mouther's next turn.

Multiattack

Cost 1

The gibbering mouther makes one bite attack and, if it can, uses its Blinding Spittle.

About Gibbering Mouther

Gibbering Mouther is a medium aberration with a Challenge Rating of 2. It has a neutral 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 10 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 10 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.