Creature Reference Back to Creatures

Deep One

Medium · Humanoid · CR 2 · Chaotic Evil

Source. Tome of Beasts 1 (2023 Edition)

13 (natural armor)

71 (11d8 + 22)

Ability Scores

Core attributes and their modifiers.

STR

DEX

CON

INT

WIS

-1

CHA

Overview

Category Monsters

Size Medium

Type Humanoid

Alignment Chaotic Evil

XP 450

Initiative Bonus +1

Movement

Walk 30 ft (9.1 m)

Swim 15 ft (4.6 m)

Climb 15 ft (4.6 m)

Crawl 15 ft (4.6 m)

Senses

Darkvision 120 ft (36.6 m)

Passive Perception 9

Saving Throws

Strength +5 Constitution +4 Charisma +3

Languages

Common, Void Speech

Resistances & Immunities

Damage Resistances

cold

Damage Vulnerabilities

fire

Traits

Amphibious

The deep one can breathe air and water.

Frenzied Rage

If a deep one takes 10 or more damage from a single attack, it has advantage on its Claws attack and gains a +2 bonus to damage with its Claws until the end of its next turn.

Actions

Claws

+5 to hit, reach 5 ft (1.5 m). Hit: 2d8+3 slashing damage.

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 12 (2d8 + 3) slashing damage.

About Deep One

Deep One is a medium humanoid with a Challenge Rating of 2. It has a chaotic evil alignment.

In combat, this creature maintains an Armor Class of 13 and possesses 71 hit points (derived from 11d8 + 22).

Deep One has communication capabilities including Common, Void Speech. This allows it to interact verbally with various creatures and characters.

GM Tips: Using Deep One

2 tips available

When using Deep One in your D&D 5e campaign, consider these tactical approaches:

Mid-level Encounter: Ideal for parties levels 3-8 as solo or small groups
Terrain Advantage: Use terrain to offset moderate combat abilities

Player Guide: Facing Deep One

2 strategies available

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

Moderate Threat: Prepare standard combat tactics
Tactical Advantage: Use terrain and positioning

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 2.

Solo Encounter:

A single character of level 4 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 600 XP
Hard: 900 XP
Deadly: 1,200 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 Deep One?: Deep One has a Challenge Rating of 2, making it appropriate for parties of level 2.0.
What type of creature is Deep One?: Deep One is a Medium Humanoid, which affects how certain spells and abilities interact with it.
What languages does Deep One speak?: Deep One can communicate in Common, Void Speech.