Gargantuan Ooze, Unaligned
Armor Class 22 Natural armour (plate)
Hit Points 581 (28d20 + 280)
Speed 20 ft.
STR
24 (+7)
DEX
3 (-4)
CON
30 (+10)
INT
6 (-2)
WIS
6 (-2)
CHA
6 (-2)
Saving Throws STR +15, CON +18, WIS +6, CHA +6
Damage Resistances Cold, Fire, Lightning, Poison; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks
Damage Immunities Acid, Necrotic
Senses Blindsight 1 mile. (blind beyond this radius), Passive Perception 8
Languages --
Challenge 27 (105,000 XP)
Proficiency Bonus +8
Traits

Necrotic Substance. A creature that touches the Bone Ooze or hits it with a melee attack while within 5 feet of it takes 4 (1d8) necrotic damage.

Ooze Cube. The Bone Ooze takes up its entire space. Other creatures can enter the space, but a creature that does so is subjected to the Bone Ooze's Engulf and has disadvantage on the saving throw. Creatures inside the cube can be seen but have total cover.

A creature within 5 feet of the Bone Ooze can take an action to pull a creature or object out of the Bone Ooze. Doing so requires a successful DC 26 Strength check, and the creature making the attempt takes 36 (6d12) necrotic damage.

The Bone Ooze can hold only one Huge creature, three Large creatures or up to 16 Medium or smaller creatures inside it at a time.

Osseous Constitution. While the Bone Ooze has over half of it's hit points left, it has a damage threshold of 30 damage. Any damage that fails to meet or exceed the Bone Ooze's damage threshold doesn't reduce it's hit points. Additionally, while the Bone Ooze has half or less than half of it's hit points left, it's AC becomes 12 and all bludgeoning, piercing and slashing damage that it deals is halved.

Regeneration. The Bone Ooze regains 30 hit points at the start of its turn. The Bone Ooze dies only if it starts its turn with 0 hit points and doesn't regenerate.

Actions

Engulf. The Bone Ooze moves up to its speed. While doing so, it can enter Huge or smaller creatures' spaces. Whenever the cube enters a creature's space, the creature must make a DC 26 Dexterity saving throw.

On a successful save, the creature can choose to be pushed 5 feet back or to the side of the Bone Ooze. A creature that chooses not to be pushed suffers the consequences of a failed saving throw.

On a failed save, the cube enters the creature's space, and the creature takes 12 (2d12) necrotic damage and is engulfed. The engulfed creature can't breathe, is restrained, and takes 12 (2d12) necrotic damage, plus an additional 12 (2d12) bludgeoning, 12 (2d12) piercing and 12 (2d12) slashing damage at the start of each of the Bone Ooze's turns. When it moves, the engulfed creature moves with it.

An engulfed creature can try to escape by taking an action to make a DC 26 Strength check. On a success, the creature escapes and enters a space of its choice within 5 feet of the Bone Ooze.

Pseudopod. Melee Weapon Attack: +17 to hit, reach 10 ft., two creatures. Hit:  6 (1d12) necrotic damage, plus an additional 32 (5d12) piercing damage.

Shower of Bones (Recharge 5 - 6). The Bone Ooze sprays bone fragments in a 60-foot cone. Each creature in that line must make a DC 26 Dexterity saving throw, taking 25 (10d4) bludgeoning, 25 (10d4) piercing damage and 25 (10d4) slashing damage on a failed save, or half as much on a successful save.

Spear of Bones (Recharge 5 - 6). The Bone Ooze sprays bone fragments in a 180-foot line that is 15 feet wide. Each creature in that line must make a DC 26 Dexterity saving throw, taking 25 (10d4) bludgeoning, 25 (10d4) piercing damage and 25 (10d4) slashing damage on a failed save, or half as much on a successful save.

Reactions

Bone Absorption. If the Bone Ooze reduces a creature to 0 hit points with a melee attack on it’s turn, the Bone Ooze can use it's reaction to regain 60 hit points.

Legendary Actions

The Bone Ooze can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The Bone Ooze regains spent legendary actions at the start of its turn.

Engulf. The Bone Ooze makes an engulf attack.

Move. The Bone Ooze moves up to it's speed.

Absorb (2 actions). The Bone Ooze makes a pseudopod attack. If a creature is hit while they have less than half of their hit points they must make a DC 26 Constitution saving throw or die on a failed save, or take 10d4 piercing damage plus 10d8 necrotic damage with a successful one.

Description

This massive mound is covered in a carpet of needle-like spines. Plates of bone rise to its surface and sink back within its mass, giving rise to strange angular forms as it moves.

Horrifying creatures of semi-liquid bone, bone oozes are created from the greatest boneyards imaginable. Massive battles may create these abominations, especially if they took place on unhallowed ground or involved undead combatants. The bone ooze that pulls itself from these places seeks to devour bones of all kinds, extracting them from the living and the dead alike.

A bone ooze’s only ecological role is to consume. These monstrous predators can destroy entire ecosystems in a matter of days, reducing the skeletons of its victims to a slime which then joins the bone ooze. A bone ooze that consumes about a city's amount of creatures divides, and the two oozes roll their separate ways. If they ever cross each other’s paths again, the creatures will attempt to devour each other.

In combat, bone oozes are implacable, rolling over their opponents and leaving them with bleeding, suppurating wounds. If attacked at range, they automatically react with their breath weapons, spraying a storm of bone shards that can shred enemies. Bone oozes are attracted to and seemingly mesmerized by negative energy—some clever undead monsters have taken advantage of this by “domesticating” the oozes through repeated exposure to negative energy. Such undead masters should be careful, though, as the bone ooze will swiftly turn on and devour any creature that fails to supply it with its fix.

Previous Versions

Name Date Modified Views Adds Version Actions
12/7/2020 8:52:10 AM
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1
1.0
Coming Soon
1/2/2021 2:09:56 AM
3
1
1.5
Coming Soon

Habitat: GrasslandSwampUnderdark

Keylith_The_Mage

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