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Magma Octopus

Large · Elemental · CR 8 · Neutral

Source. Tome of Beasts 2

16 (natural armor)

147 (14d10+70)

Ability Scores

Core attributes and their modifiers.

STR

DEX

CON

INT

-3

WIS

-1

CHA

-2

Overview

Category Monsters

Size Large

Type Elemental

Alignment Neutral

XP 3900

Initiative Bonus +3

Movement

Walk 40 ft (12.2 m)

Swim 20 ft (6.1 m)

Climb 20 ft (6.1 m)

Crawl 20 ft (6.1 m)

Senses

Darkvision 60 ft (18.3 m)

Passive Perception 9

Skills

Athletics +8 Stealth +6

Resistances & Immunities

Damage Immunities

fire

Traits

Lava Bound

The magma octopus can exist outside of lava for up to 1 hour each day. If it remains outside of lava for 1 minute or longer, its skin begins to dry and harden like rapidly-cooled magma. While its skin is hardened, it has a walking speed of 20 feet, an Armor Class of 18, and vulnerability to cold damage. If it remains outside of lava for 1 hour or longer, it becomes petrified, transforming into basalt. Its body returns to normal if it is submerged in lava for 1 round.

Lava Swimmer

While in lava, the magma octopus has a swimming speed of 60 feet and can move through the lava as if it were water.

Actions

Magma Blast

Recharge 6

The magma octopus sprays magma in a 30-foot cone. Each creature in that area must make a DC 16 Dexterity saving throw, taking 28 (8d6) fire damage on a failed save, or half as much damage on a successful one. If a creature fails the saving throw by 5 or more, it catches fire. Until someone takes an action to douse the fire, the creature takes 5 (1d10) fire damage at the start of each of its turns.

Multiattack

The magma octopus makes four attacks with its tentacles.

Tentacle

+8 to hit, reach 15 ft (4.6 m). Hit: 1d6+5 plus 1d4 fire damage.

Melee Weapon Attack: +8 to hit, reach 15 ft., one target. Hit: 8 (1d6 + 5) bludgeoning damage plus 2 (1d4) fire damage. If the target is a creature, it is grappled (escape DC 16). Until this grapple ends, the target is restrained, and it takes 2 (1d4) fire damage at the start of each of its turns. The magma octopus can grapple up to two targets at a time.

About Magma Octopus

Magma Octopus is a large elemental with a Challenge Rating of 8. It has a neutral alignment.

In combat, this creature maintains an Armor Class of 16 and possesses 147 hit points (derived from 14d10+70).

GM Tips: Using Magma Octopus

1 tips available

When using Magma Octopus in your D&D 5e campaign, consider these tactical approaches:

Fire Damage Mitigation: This creature deals fire damage. Advise players to have fire resistance ready or use water-based tactics. Consider environmental fire hazards that could backfire on the creature.

Player Guide: Facing Magma Octopus

1 strategies available

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

Fire Damage Protection: This creature deals fire damage! Get fire resistance from spells like 'Resistance' or potions. Avoid fighting near flammable objects. Water spells can counter fire attacks.

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 8.

Solo Encounter:

A single character of level 11 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 7,200 XP
Hard: 10,800 XP
Deadly: 14,400 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 Magma Octopus?: Magma Octopus has a Challenge Rating of 8, making it appropriate for parties of level 8.0.
What type of creature is Magma Octopus?: Magma Octopus is a Large Elemental, which affects how certain spells and abilities interact with it.