Gibbering Mouther

Medium Aberration, Chaotic Neutral

AC 9     Initiative −1 (9)
HP 52 (7d8 + 21)
Speed 20 ft., Swim 20 ft.

Ability Scores
STR 10 (+0) Save +0    DEX 8 (−1) Save −1    CON 16 (+3) Save +3
INT 3 (−4) Save −4    WIS 10 (+0) Save +0    CHA 6 (−2) Save −2

Immunities Prone
Senses Darkvision 60 ft.; Passive Perception 10
Languages None
CR 2 (XP 450; PB +2)

Traits
Aberrant Ground. The ground in a 10-foot Emanation originating from the mouther is Difficult Terrain.
Gibbering. The mouther babbles incoherently while it doesn’t have the Incapacitated condition. Wisdom Saving Throw: DC 10, any creature that starts its turn within 20 feet of the mouther while it is babbling. Failure: The target rolls 1d8 to determine what it does during the current turn:

• 1–4. The target does nothing.
• 5–6. The target takes no action or Bonus Action and uses all its movement to move in a random direction.
• 7–8. The target makes a melee attack against a randomly determined creature within its reach or does nothing if it can’t make such an attack.

Actions
Bite. Melee Attack Roll: +2, reach 5 ft. Hit: 7 (2d6) Piercing damage. If the target is a Medium or smaller creature, it has the Prone condition. The target dies if it is reduced to 0 Hit Points by this attack. Its body is then absorbed into the mouther, leaving only equipment behind.
Blinding Spittle (Recharge 5–6). Dexterity Saving Throw: DC 10, each creature in a 10-foot-radius Sphere centered on a point within 30 feet. Failure: 7 (2d6) Radiant damage, and the target has the Blinded condition until the end of the mouther’s next turn.