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Ouroboros

Huge · Dragon · CR 6 · Neutral

Source. Creature Codex

15 (natural armor)

94 (9d12+36)

Ability Scores

Core attributes and their modifiers.

STR

DEX

CON

INT

WIS

CHA

Overview

Category Monsters

Size Huge

Type Dragon

Alignment Neutral

XP 2300

Initiative Bonus +0

Movement

Walk 40 ft (12.2 m)

Fly 80 ft (24.4 m)

Swim 20 ft (6.1 m)

Climb 20 ft (6.1 m)

Crawl 20 ft (6.1 m)

Senses

Darkvision 120 ft (36.6 m)

Blindsight 60 ft (18.3 m)

Passive Perception 17

Saving Throws

Dexterity +3 Constitution +7 Wisdom +7 Charisma +4

Skills

Arcana +8 History +8 Perception +7

Languages

all

Traits

Energetic Rebirth

When the ouroboros is slain, it is reborn in a burst of energy in a 300-foot radius from its body. Roll any die. On an even result, the energy causes plants to grow, and creatures in the area regain 22 (5d8) hp. On an odd result, creatures in the area must make a DC 15 Constitution saving throw, taking 22 (5d8) necrotic damage on a failed save, or half as much damage on a successful one.

Variegated Scales

As a bonus action, the ouroboros gains immunity to one type of damage. It can change this immunity from one type to another as a bonus action.

Actions

Bite

+8 to hit, reach 10 ft (3 m). Hit: 1d10+5 piercing damage.

Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 10 (1d10 + 5) piercing damage.

Blurring Façade (Costs 2 Actions)

The ouroboros blurs and shifts light around itself or another creature it can see within 60 feet of it. Attacks against the target have disadvantage until the end of the ouroboros' next turn. The target can resist this effect with a successful DC 15 Wisdom saving throw.

Guiding Beacon (Costs 2 Actions)

The ouroboros causes itself or another creature it can see within 60 feet of it to illuminate with white flame. Attacks against the target have advantage until the end of the ouroboros' next turn. The target can resist this effect with a successful DC 15 Wisdom saving throw.

Introspective Presence

Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 15 Wisdom saving throw or be incapacitated for 1 minute as the creature is overcome by introspective thoughts. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Introspective Presence for the next 24 hours.

Kaleidoscopic Breath

Recharge 5–6

The ouroboros exhales energy in a 30-foot cone. Each creature in that area must make a DC 15 Dexterity saving throw, taking 27 (6d8) damage on a failed save, or half as much damage on a successful one. The damage is either acid, cold, fire, lightning, necrotic, poison, radiant, or thunder. The dragon chooses the type of damage before exhaling.

Multiattack

The ouroboros can use its Introspective Presence. It then makes two bite attacks.

Reactions

Reactive Hide

When the dragon is hit with an attack, it gains resistance to damage of that type until the end of its next turn, including the damage from the attack that triggered this reaction.

Legendary Actions

Bite Attack

Cost 1

The ouroboros makes one bite attack.

Blurring Façade

Cost 2

Guiding Beacon

Cost 2

About Ouroboros

Ouroboros is a huge dragon with a Challenge Rating of 6. It has a neutral alignment.

In combat, this creature maintains an Armor Class of 15 and possesses 94 hit points (derived from 9d12+36).

Ouroboros has communication capabilities including all. This allows it to interact verbally with various creatures and characters.

GM Tips: Using Ouroboros

4 tips available

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

Flight Control Strategy: Target flying creatures with spells like 'Hold Person', 'Web', or 'Grease' to ground them. Without flight restriction, they can escape melee range easily. Consider area denial spells below their flight altitude to force them into disadvantageous positions.
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.
Cold Damage Strategy: Cold-based attacks can slow or freeze. Prepare 'Heat Metal' or fire spells as countermeasures. Ice terrain can be used to create difficult terrain for melee characters.
Lightning Damage Awareness: Lightning attacks often have long range and high speed. Advise players to use cover and avoid metal armor/weapons. Water surfaces amplify lightning damage - avoid fighting near water.

Player Guide: Facing Ouroboros

4 strategies available

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

Counter Flight Advantage: This creature can fly! Use ranged attacks, reach weapons, or spells like 'Thunderwave' to push it away. Consider 'Gust of Wind' or 'Earthbind' to ground it. Melee characters need fly speed or flight magic to engage.
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.
Cold Damage Protection: This creature deals cold damage! Get cold resistance or use fire spells. Avoid water surfaces - they can freeze and create difficult terrain. 'Heat Metal' can counter cold.
Lightning Damage Protection: This creature deals lightning damage! Avoid metal armor and weapons. Use cover and avoid water surfaces. 'Iron Skin' or 'Protection from Energy' can help.

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 Ouroboros?: Ouroboros has a Challenge Rating of 6, making it appropriate for parties of level 6.0.
What type of creature is Ouroboros?: Ouroboros is a Huge Dragon, which affects how certain spells and abilities interact with it.
What languages does Ouroboros speak?: Ouroboros can communicate in all.