Poseidon: God of the Sea

Large celestial (divinity), chaotic neutral

Armor Class 19 (natural armor)
Hit Points 414 (36d10 + 216)
Speed 40 ft., swim 80 ft.

28 (+9) 22 (+6) 22 (+6) 16 (+3) 26 (+8) 18 (+4)

Saving Throws Str +17, Dex +14, Con +14, Wis +16
Skills Athletics +17, History +11, Intimidation +12, Nature +11, Perception +16
Damage Resistances acid, fire; bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities cold, poison
Condition Immunities charmed, exhaustion, frightened, poisoned
Senses truesight 120 ft., passive Perception 26
Languages aquan, Celestial, Common, Primordial; telepathy 120 ft.
Challenge 26 (90,000 XP)

Special Traits

  • Legendary Resistance (3/day). If Poseidon fails a saving throw, he can choose to succeed instead.
  • Amphibious. Poseidon can breathe air and water.
  • Primordial Flood (1/day). Poseidon makes the ground erupt with diluvial geysers, and the sky spurt torrential rain, flooding the area in a 300 ft. radius with 10 feet of water. If the terrain allows water to accumulate, the water level rises by 5 feet at the end of each of Poseidon’s turns, otherwise, the depth remains at 10 feet.
  • Godly Weapon. Poseidon’s weapon attacks are magical.
  • Ichthyoid Shoal. Poseidon commands a 60 ft. wide shoal of marine creatures who stay centered on him until they receive a command. Any creature other than Poseidon that starts its turn in the area must succeed on a DC 24 Constitution saving throw or take 11 (2d10) piercing damage and 11 (2d10) poison damage (no poison damage on a success). The shoal needs at least 2 feet of water to appear.
  • Innate Spellcasting. Poseidon’s innate spellcasting ability is Wisdom (spell save DC 24, +16 to hit with spell attacks). He can innately cast the following spells, requiring no material components:


  • Basaltic Conduit (Recharge 5-6). Poseidon’s left arm turns into a basaltic conduit, shooting out a stream of acid in a 60 ft. cone. Each creature in the affected area must make a DC 22 Dexterity saving throw, taking 45 (10d8) acid damage and 45 (10d8) fire damage on a failed save, or half as much damage on a successful one.
  • Multiattack. Poseidon makes three Trident of Tartaros attacks.
  • Trident of Tartaros. Melee or Ranged Weapon Attack: +17 to hit, reach 15 ft. or range 60/120 ft., one target. Hit: 25 (3d10 + 9) piercing damage. Poseidon’s trident can be recalled to his right hand instantly.


  • Watery Form. Poseidon momentarily assumes the form of water, reducing the damage of incoming attacks (including area of effect attacks) by half. This does not apply to lightning damage

Legendary Actions

Poseidon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Poseidon regains spent legendary actions at the start of his turn.

  • Attack. Poseidon makes one Trident of Tartaros attack.
  • Command the Sea. Poseidon commands his Ichthyoid Shoal to move up to 60 feet.
  • Minor Casting. Poseidon casts Control Water or Dominate Monster (must have a swimming speed).
  • Major Casting (Costs 2 Actions). Poseidon casts tidal wave, wall of water, or watery sphere.


Poseidon is the violent and ill-tempered god of the sea, storms, earthquakes and horses. He is Zeus and Hades’ brother and lives in a palace made out of coral at the bottom of the sea. He grants favour to those he likes on the sea, and is the cause of calamity for others.

Section 15: Copyright Notice

Dungeons & Divinities: Greek Pantheon Codex Copyright 2020 Nicolas (Zehus) Levastre Author: Nicolas (Zehus) Levastre.