Gargantuan Ooze, Unaligned
Armor Class 12
Hit Points 216 (16d20 + 48)
Speed 0 ft., Fly 30 ft. (Hover)
STR
7 (-2)
DEX
15 (+2)
CON
16 (+3)
INT
1 (-5)
WIS
6 (-2)
CHA
1 (-5)
Damage Resistances Bludgeoning, Piercing, and Slashing from Nonmagical Attacks
Damage Immunities Acid, Lightning
Senses Blindsight 120 ft. (Blind beyond this radius), Passive Perception 8
Languages --
Challenge 10 (5,900 XP)
Proficiency Bonus +4
Traits

Misty Form. The cumulooze can occupy another creature's space, and vice versa. In addition, if air can pass through a space, the cumulooze can pass through it without squeezing. Each foot of movement in water costs it 2 extra feet, rather than 1 extra foot. The cumulooze cannot manipulate objects in any way that requires fingers or manual dexterity.

Ooze Cloud. Any creature other than an ooze that starts its turn sharing a space with the cumulooze must succeed on a DC 15 Constitution saving throw or take 7 (2d6) acid damage and be Poisoned until the start of the creature's next turn. Within the cumulooze's space, everything more than 5 ft. away from a creature except for the cumulooze is heavily obscured.

Unusual Nature. The cumulooze doesn't require air or sleep.

Actions

Multiattack. The cumulooze makes two Shock attacks.

Shock. Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 60 ft., one target. Hit: 18 (3d10+2) lightning damage.

Melting Billow. The cumulooze moves up to its speed. During this move, each creature whose space the cumulooze shared must make a DC15 Constitution saving throw. On a failure, the creature takes 21 (6d6) acid damage and spends its action on its next turn retching and reeling. On a successful save, the creature takes half as much damage with no additional effects.

Corrosive Precipitation. The cumulooze rains acid on everything below it. Each creature within 40 ft. of the cumulooze that is directly below it and not behind total cover must succeed on a DC 15 Constitution saving throw or take 36 (8d8) acid damage, or half as much on a success. Any objects that are not being worn or carried that are not behind total cover within this area are also affected - such objects automatically fail their saving throw, and take the maximum amount of damage possible.

Description

Experienced adventurers know to keep an eye on their surroundings, especially when the corrosive plagues known as oozes are known to be near. unfortunately, the territory of some oozes are much more difficult to predict than others. Such is the case for the cumulooze: a massive gaseous cloud of carnivorous acid that roams high in the sky. While they don't often visit the ground, such visitations are invariably devastating to anybody caught in their wake.

Voracious Storm Clouds. Cumuloozes will eat anything made of meat, but they especially enjoy flesh that is seared and burnt. Small prey such as flocks of birds are quickly dissolved by the cloud's melting mists. It instead prefers prey that it can electrocute using the friction its body creates, then digest over time.

Corrupted Water Cycle. Cumuloozes are formed when many oozes die and melt away into the natural environment or sewage system. Over time, these remains flow into aquifers, rivers, and seas. When enough of these remains congeal together in a particular body of water, they evaporate alongside water into clouds, reincorporating into a cumulooze in the process.

The Ooze Cycle. A particularly well-fed cumulooze may produce lesser oozes as it rains. When the cumulooze uses its Corrosive Precipitation for the first time each day, the cumulooze produces oozes in the unoccupied spaces within the affected area (choose one or roll a d6):

Solar_Bun_Bun

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