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Monster · SRD 5.2.1

Hydra

Huge monstrosity, unaligned

Armor Class
15
Hit Points
184 (16d12)
Speed
swim 40 ft., 40 ft.
STR
20 (+5)
DEX
12 (+1)
CON
20 (+5)
INT
2 (-4)
WIS
10 (+0)
CHA
7 (-2)
Senses
darkvision 60 ft., passive perception 16
Challenge
8 (3,900 XP)

Traits

Hold Breath. The hydra can hold its breath for 1 hour.

Multiple Heads. The hydra has five heads. Whenever the hydra takes 25 damage or more on a single turn, one of its heads dies. The hydra dies if all its heads are dead. At the end of each of its turns when it has at least one living head, the hydra grows two heads for each of its heads that died since its last turn, unless it has taken Fire damage since its last turn. The hydra regains 20 Hit Points when it grows new heads.

Reactive Heads. For each head the hydra has beyond one, it gets an extra Reaction that can be used only for Opportunity Attacks.

Actions

Multiattack. The hydra makes as many Bite attacks as it has heads.

Bite. Melee Attack Roll: +8, reach 10 ft. Hit: 10 (1d10 + 5) Piercing damage.

Huge monstrosity, unaligned

Special Abilities

Hold Breath

The hydra can hold its breath for 1 hour.

Multiple Heads

The hydra has five heads. Whenever the hydra takes 25 damage or more on a single turn, one of its heads dies. The hydra dies if all its heads are dead. At the end of each of its turns when it has at least one living head, the hydra grows two heads for each of its heads that died since its last turn, unless it has taken Fire damage since its last turn. The hydra regains 20 Hit Points when it grows new heads.

Reactive Heads

For each head the hydra has beyond one, it gets an extra Reaction that can be used only for Opportunity Attacks.

Actions

Multiattack

The hydra makes as many Bite attacks as it has heads.

Bite

Melee Attack Roll: +8, reach 10 ft. Hit: 10 (1d10 + 5) Piercing damage.

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This work includes material from the System Reference Document 5.2.1 (“SRD 5.2.1”) by Wizards of the Coast LLC, available at https://www.dndbeyond.com/srd. The SRD 5.2.1 is licensed under the Creative Commons Attribution 4.0 International License, available at https://creativecommons.org/licenses/by/4.0/legalcode.

Reformatted and reorganized for presentation on PostRoll; text unmodified.

Licensed under Creative Commons Attribution 4.0 International.

srd-5.2.1 · Version 1.0.0 · Updated Jul 9, 2026