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```statblock
monster: Gibbering Mouther
```
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*Medium aberration, neutral*
**Armor Class** 9
**Hit Points** 67 (9d8+27)
**Speed** 10 ft., swim 10 ft.
| STR | DEX | CON | INT | WIS | CHA |
|---------|--------|---------|--------|---------|--------|
| 10 (+0) | 8 (-1) | 16 (+3) | 3 (-4) | 10 (+0) | 6 (-2) |
**Condition Immunities** prone
**Senses** darkvision 60 ft., passive Perception 10
**Languages** -
**Challenge** 2 (450 XP)
***Aberrant Ground***. The ground in a 10-foot radius around the mouther is dough-like 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.
***Multiattack***. The gibbering mouther makes one bite attack and, if it can, uses its Blinding Spittle.
***Bites***. *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 (Recharge 5-6)***. 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.