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Ruby Ooze

Medium · Ooze · CR 6 · Unaligned

Source. Creature Codex

93 (11d8+44)

Ability Scores

Core attributes and their modifiers.

STR

DEX

-1

CON

INT

-4

WIS

-2

CHA

-5

Overview

Category Monsters

Size Medium

Type Ooze

Alignment Unaligned

XP 2300

Initiative Bonus -1

Movement

Walk 20 ft (6.1 m)

Swim 10 ft (3 m)

Climb 20 ft (6.1 m)

Crawl 10 ft (3 m)

Senses

Blindsight 60 ft (18.3 m)

Passive Perception 8

Languages

Resistances & Immunities

Damage Immunities

acid, fire

Damage Resistances

bludgeoning, piercing, and slashing from nonmagical attacks

Damage Vulnerabilities

lightning

Condition Immunities

blinded, charmed, deafened, exhaustion, frightened, prone

Traits

Ambusher

The ooze has advantage on attack rolls against any creature it has surprised.

Amorphous

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

Corrosive Form

A creature that touches the ooze or hits it with a melee attack while within 5 feet of it takes 7 (2d6) acid damage. Any nonmagical weapon made of metal or wood that hits the ooze is coated in a corrosive red slime. After dealing damage, the weapon takes a permanent and cumulative -1 penalty to damage rolls. If its penalty drops to -5, the weapon is destroyed. Nonmagical ammunition made of metal or wood that hits the ooze is destroyed after dealing damage. The ooze can eat through 2-inch-thick, nonmagical wood or metal in 1 round.

False Appearance

While the ooze remains motionless, it is indistinguishable from a pile of rubies.

Spider Climb

The ooze can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Actions

Acid Spray

Recharge 5–6

The ooze sprays its bright red protoplasm in a 20-foot line that is 5 feet wide. Each creature in that line must make a DC 15 Dexterity saving throw. On a failure, the creature takes 21 (6d6) acid damage and is restrained as its flesh begins to turn into a translucent ruby-like stone. On a success, the creature takes half the damage and isn't restrained. The restrained creature must make a DC 15 Constitution saving throw at the end of its next turn, taking 21 (6d6) acid damage and becoming petrified on a failure or ending the effect on a success.

Multiattack

The ruby ooze makes two pseudopod attacks.

Pseudopod

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

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 9 (2d6 + 2) bludgeoning damage plus 14 (4d6) acid damage.

About Ruby Ooze

Ruby Ooze is a medium ooze with a Challenge Rating of 6. It has a unaligned alignment.

In combat, this creature maintains an Armor Class of 9 and possesses 93 hit points (derived from 11d8+44).

Ruby Ooze has communication capabilities including -. This allows it to interact verbally with various creatures and characters.

GM Tips: Using Ruby Ooze

2 tips available

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

Climbing Advantage: This creature can climb at 20 ft. It can use walls and ceilings for tactical positioning. Consider using 'Spider Climb' negation or fighting in open areas without vertical surfaces.
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 Ruby Ooze

2 strategies available

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

Climbing Defense: This creature can climb at 20 ft! It can use walls and ceilings for surprise attacks. Fight in open areas without vertical surfaces. 'Spider Climb' negation spells can help.
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 6.

Solo Encounter:

A single character of level 9 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 4,200 XP
Hard: 6,300 XP
Deadly: 8,400 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 Ruby Ooze?: Ruby Ooze has a Challenge Rating of 6, making it appropriate for parties of level 6.0.
What type of creature is Ruby Ooze?: Ruby Ooze is a Medium Ooze, which affects how certain spells and abilities interact with it.
What languages does Ruby Ooze speak?: Ruby Ooze can communicate in -.