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Mineral Ooze

Large · Ooze · CR 3 · Neutral

Source. Tome of Beasts 2

76 (8d10+32)

Ability Scores

Core attributes and their modifiers.

STR

DEX

-1

CON

INT

-5

WIS

-3

CHA

-4

Overview

Category Monsters

Size Large

Type Ooze

Alignment Neutral

XP 700

Initiative Bonus -1

Movement

Walk 20 ft (6.1 m)

Swim 10 ft (3 m)

Climb 10 ft (3 m)

Crawl 10 ft (3 m)

Senses

Blindsight 60 ft (18.3 m)

Passive Perception 7

Resistances & Immunities

Damage Resistances

acid, cold, fire

Condition Immunities

blinded, charmed, deafened, exhaustion, frightened, prone

Traits

Amorphous

The ooze can move through a space as narrow as 1 inch wide without squeezing.

False Appearance

While the ooze remains motionless, it is indistinguishable from an oily pool or wet rock.

Mineralize

As a bonus action when it has encased a creature, the ooze hardens the minerals in its body, turning the surface of its body into a stone-like material. While mineralized, the ooze has a walking speed of 5 feet, and it has resistance to bludgeoning, piercing, and slashing damage. The ooze remains mineralized until the creature it has encased dies, or until the ooze takes a bonus action to end it.

Actions

Encase

The mineral ooze encases a Medium or smaller creature grappled by it. The encased target is blinded, restrained, and unable to breathe, and it must succeed on a DC 14 Constitution saving throw at the start of each of the ooze's turns or take 7 (2d6) acid damage. If the ooze moves, the encased target moves with it. The ooze can have only one creature encased at a time. An encased creature can try to escape by taking an action to make a DC 12 Strength check. The creature has disadvantage on this check if the ooze is mineralized. On a success, the creature escapes and enters a space of its choice within 5 feet of the ooze. Alternatively, a creature within 5 feet of the ooze can take an action to pull a creature out of the ooze. Doing so requires a successful DC 12 Strength check, and the creature making the attempt takes 7 (2d6) acid damage. The creature making the attempt has disadvantage on the check if the ooze is mineralized.

Multiattack

The mineral ooze makes two slam attacks. If both attacks hit a Medium or smaller target, the target is grappled (escape DC 12), and the ooze uses its Encase on the target.

Pseudopod

+4 to hit, reach 5 ft (1.5 m). Hit: 1d8+2 plus 1d6 acid damage.

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) bludgeoning damage plus 3 (1d6) acid damage.

About Mineral Ooze

Mineral Ooze is a large ooze with a Challenge Rating of 3. It has a neutral alignment.

In combat, this creature maintains an Armor Class of 9 and possesses 76 hit points (derived from 8d10+32).

GM Tips: Using Mineral Ooze

1 tips available

When using Mineral Ooze in your D&D 5e campaign, consider these tactical approaches:

Amorphous Movement: This creature can squeeze through spaces as small as 1 inch! Traditional barriers are ineffective. Use 'Wall of Force', 'Forcecage', or magical barriers to contain it.

Player Guide: Facing Mineral Ooze

1 strategies available

When your party encounters this creature, keep these strategies in mind:

Contain Amorphous Creature: This creature can squeeze through tiny spaces! Traditional barriers won't work. Use 'Wall of Force', 'Forcecage', or magical barriers. 'Create Bonfire' can block movement.

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 3.

Solo Encounter:

A single character of level 5 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 1,200 XP
Hard: 1,800 XP
Deadly: 2,400 XP

Based on D&D 5e Dungeon Master's Guide encounter building guidelines. CR roughly equals party level for medium encounters.

Frequently Asked Questions

What is the challenge rating of Mineral Ooze?: Mineral Ooze has a Challenge Rating of 3, making it appropriate for parties of level 3.0.
What type of creature is Mineral Ooze?: Mineral Ooze is a Large Ooze, which affects how certain spells and abilities interact with it.