Gibbering Mouther, Massive

Family: Gibbering Mouther

Large ravager (devastation), chaotic evil or unaligned

Armor Class 9
Hit Points 147 (14d10 + 70); Wound Threshold 37
Speed 20 ft., swim 20 ft.

STR	DEX	CON	INT	WIS	CHA
16 (+3)	8 (-1)	20 (+5)	4 (-3)	14 (+2)	5 (-3)

Saving Throws Con +8
Damage Vulnerabilities acid
Damage Resistances force; bludgeoning, piercing and slashing from non-magical attacks
Damage Immunities (see Chaotic Resilience)
Condition Immunities grappled, prone, restrained
Senses darkvision 60 ft., tremorsense 60 ft., passive Perception 12
Languages Phantasm
Challenge 6 (2,300 XP)

SPECIAL TRAITS

• Aberrant Ground. The ground in a 15-foot radius around the massive mouther is doughlike difficult terrain. Each creature that starts its turn in that area must succeed on a DC 16 Strength saving throw or have its speed reduced to 0 until the start of its next turn.
• Chaotic Resilience. At the start of its turn, the massive mouther gains immunity (GM’s choice) to one of the following types of damage: cold, fire, lightning, necrotic, poison, psychic, radiant, thunder. The chosen immunity cannot be the same two turns in a row.
• Corrosive Fluids. After dealing a Wound or a critical hit to the massive mouther, the weapon used is covered in corrosive fluids. Any non-magical weapon or armor under this effect, and which is not protected by an appropriate forging technique (such as dwarven forging), becomes fragile (see Adventurers, Equipment, Armory: Damaged Weapons and Armor).
• Gibbering. The massive mouther babbles incoherently while it can see any creature and isn’t incapacitated. Each creature that starts its turn within 20 feet of the massive mouther and can hear the gibbering must succeed on a DC 13 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.

d8	Effect
1 to 4	The creature does nothing.
5 to 6	The creature takes no action or bonus action and uses all its movement to move in a randomly determined direction.
7 to 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

• Multiattack. The massive gibbering mouther makes one bite attack and, if it can, uses its Blinding Spittle.
• Bite. Melee Weapon Attack: +6 to hit, reach 10 ft., one creature. Hit: 25 (5d8 + 3) piercing damage. If the target is Medium or smaller, it must succeed on a DC 14 Strength saving throw or be knocked prone.
• Blinding Spittle (Recharge 5-6). The massive mouther spits a chemical glob at a point it can see within 20 feet of it. The glob explodes in a blinding flash of light on impact. Each creature within 10 feet of the flash must succeed on a DC 16 Dexterity saving throw or be blinded until the end of the mouther’s next turn.
• Voracious Ingestion. A Medium or smaller creature within 5 feet of the massive mouther must succeed on a DC 16 Dexterity saving throw or be grappled (escape DC 14). Until this grapple ends, the creature is also restrained, and the massive mouther can’t ingest another target. In addition, the creature takes 10 (2d6 + 3) bludgeoning damage at the end of each of the mouther’s turns. If a creature takes damage this way, apply the Corrosive Fluids effect to its armor.

ABOUT

The gibbering mouther is an animated, autonomous, Cankerous growth, capable of merging back into the morbid mass from which it came. It perpetually conjures ephemeral eyes, mouths, or other organs according to its immediate needs.

These creatures appear to be a large glob of animated mucus, dripping goo as they wander. Around them, the ground appears to be moving and reality, distorted. This effect is linked to the profound reality of Canker and its world-changing aspect-dissolving, deconstructing, and, finally, recomposing.

A gibbering mouther’s maximum size depends on that of the metastasis which gave birth to it. The most common ones, closer to the surface, can only generate medium sized gibbering mouthers; older, deeper ones can create monsters that are much larger and stronger, more dangerous and resilient. The gibbering mouther is a guardian dedicated to protecting the nest, and especially its vile heart: the beating growth.

The Devouring Horror

If you use this option, the gibbering mouther’s Voracious Ingestion is more dangerous and gains the following special features:

If a creature grappled by a gibbering mouther does not use its action to escape, it takes an additional 7 (2d6) bludgeoning damage, which is added to the other damage.

Wounds inflicted by Voracious Ingestion translate as complex fractures that render the affected limbs useless. If a leg were grabbed, it would appear almost crushed.

If the common gibbering mouther reduces a creature to 0 hit points, it can use Voracious Ingestion as a bonus action. When Voracious Ingestion is used on a creature that has dropped to 0 hit points, the body is destroyed in 3 rounds and can only be brought back to life by the true resurrection or wish spells.