Gibbering Mouther

The ground in a around the Gibbering Mouther is doughlike difficult. Each creature that starts its turn in that area must succeed on a saving throw or have its speed reduced to 0 until the start of its next turn.

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 Gibbering Mouther and can hear the gibbering must succeed on a saving throw. On a failure, the creature can't take reactions until the start of its next turn and rolls a 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.

The Gibbering Mouther makes one Bite attack and, if it can, uses its Blinding Spittle.

+2 to hit, range 5 ft. Hit: 17 (5d6) piercing damage. If the target is Medium or smaller, it must succeed on a saving throw or be knocked prone. If the target is killed by this damage, it is absorbed into the Gibbering Mouther.

The Gibbering Mouther spits a chemical glob at a point it can see within 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 saving throw or be blinded until the end of the mouther's next turn.