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Glaucus, God of the Sea, Fishermen and of Prophecy

Glaucus was a Greek sea-god, depicted as a merman.

Glaucus, God of the Sea, Fishermen and of Prophecy
  • Pantheon: Greek Pantheon
  • Deity Title: Glaucus, God of the Sea, Fishermen and of Prophecy
  • Deity Symbol: A fish tail on the lower half of his body, sometimes depicted with a fisherman’s net or trident.
  • Home Plane: Elemental Plane of Water, Underwater palace of Aegaeon
  • Deity Level: Intermediate Deity
  • Alignment: Chaotic Good
  • Aliases: Glaukos, Glaukos Pontios, Glaukos of the Fishes, Glaukos of Anthedon, Glaukos of Boeotia
  • Superior: None
  • Traditional Allies: Oceanus, Amphitrite, Proteus, Triton
  • Traditional Foes: Scylla, Charybdis, Polyphemus
  • Divine Artifact: The Glaukeon, a magical seashell that allows the user to control the tides and shape water.
  • Servants: Merfolk, Nereids, sea nymphs, dolphins, seals, and other sea creatures
  • Servitor Creatures: Hippocampus, sea horses,
  • Sacred Animal: Sea horse
  • Manifestations: Appears as a sea creature or a human with a fish tail, speaks in prophetic riddles.
  • Signs of Favor: Calm seas, bountiful fishing, prophetic dreams or visions.
  • Worshipers: Sailors, fishermen, sea traders, seers, and anyone seeking guidance or divination.
  • Cleric Alignments: Chaotic Good, Chaotic Neutral, Neutral Good
  • Specialty Priests: Diviners, healers, sailors, and fishermen
  • Holy Days: The Summer Solstice, the Festival of Glaukos
  • Portfolio: Sea, sea creatures, prophecy, divination, transformation
  • Domains: Tempest, Knowledge, Nature, Trickery
  • Favored Weapon: Trident
  • Favored Class: Druid
  • Favored Race: Merfolk, sea elves
  • Duties of the Priesthood: Conducting sea rituals and divinations, protecting sea creatures and their habitats, advising sailors and fishermen.
  • Major Cult/Temple Sites: The Temple of Glaukos in Anthedon, Boeotia, and the Sanctuary of Glaukos in Ambracia, Epirus.
  • Benefits: Followers of Glaucus gain the ability to breathe underwater, resistance to cold damage, and the power to communicate with sea creatures. They may also receive prophetic dreams or visions, and the ability to transform themselves or others into sea creatures.

Glaucus is a Greek sea deity, known as the protector of fishermen and sailors. Associated with transformation and prophecy. Legend has it that Glaucus was once a mortal fisherman, who ate a magical herb and was transformed into a sea deity.

As a deity, Glaucus is dedicated to protecting those who make their living from the sea and ensuring their safe passage. He is also known to aid those who seek to transform themselves, both physically and spiritually. In some myths, Glaucus is said to possess the power of prophecy, and is often sought after for his guidance.

Physically he has a human upper body and a fish-like lower body. His upper body is muscular and well-defined, with piercing blue eyes that seem to glimmer in the light. His long hair is a mix of greens and blues, resembling seaweed, and flows in the water as if alive. His lower body is that of a fish, with iridescent scales that shimmer in the light, and a powerful tail that propels him through the water.

Glaucus exudes an air of calm and authority, and his movements are graceful and fluid, like that of a creature in their natural element. His is adorned with coral and shells, which serve as both decoration and armor. His presence inspires both reverence and awe.

Glaucus seeks to maintain balance and harmony in the natural world, and takes great pride in his role as protector of the seas. He is a wise and compassionate deity, but can also be fierce and unforgiving towards those who harm his realm. Glaucus is often depicted as a mediator between the human and divine worlds, using his powers to guide mortals on their journey towards enlightenment.

Glaucus, God of the Sea, Fishermen, and Prophecy


Armor Class 35 (natural armor), Hit Points 750 (50d20+200), Speed 60 ft., swim 120 ft.

30 (+10)30 (+10)28 (+9)28 (+9)30 (+10)30 (+10)

Skills – Arcana +25, Athletics +25, History +25, Insight +30, Nature +25, Perception +30, Religion +25

Damage Resistances – cold, lightning

Damage Immunities – fire, poison

Condition Immunities – charmed, exhaustion, frightened, poisoned

Languages – all

Challenge – 35 (1,000,000 XP)

Divine Aura. At the start of its turn, Glaucus can choose one of the following effects:

  • All allies within 1 mile gain advantage on attack rolls, saving throws, and ability checks for 1 minute.
  • All enemies within 1 mile have disadvantage on attack rolls, saving throws, and ability checks for 1 minute.

Glaucus can use this ability three times per day.

Legendary Resistance (3/day). If Glaucus fails a saving throw, he can choose to succeed instead.

Amphibious. Glaucus can breathe air and water.

Divine Awareness. Glaucus can sense the presence of any creature within 1 mile of him that has an Intelligence score of 3 or higher.

Divine Weapons. Glaucus’ melee attacks are considered magical


  • Trident of the Deep. Glaucus thrusts his trident towards a creature within 15 feet of him, dealing 70 (14d10) piercing damage and 20 (4d10) cold damage on a hit. The target must also make a DC 30 Strength saving throw or be pushed back up to 10 feet and knocked prone. Glaucus can use this ability once per round.
  • Water Form (1/day): Glaucus transforms into a watery form, gaining immunity to nonmagical attacks and resistance to magical attacks. He can move through any space as if it were difficult terrain, and can enter and occupy the same space as another creature. While in this form, Glaucus can’t take any actions, speak, or manipulate objects, and he can’t be targeted by any attack, spell, or other effect that requires a creature to be seen.
  • Prophecy (1/day): Glaucus reveals a prophecy to a single creature within 60 feet, granting them advantage on all ability checks, attack rolls, and saving throws for 1 hour. The prophecy also provides the creature with a vision of their future, giving them guidance on a significant decision or course of action.
  • Enthrall (3/day): Glaucus targets a single creature within 60 feet, captivating them with his divine presence. The target must make a DC 30 Wisdom saving throw or be charmed by Glaucus for 1 minute. While charmed, the target regards Glaucus as a trusted friend to be heeded and protected. Glaucus can’t command the target to take any harmful actions, but he can order them to perform a task or give them a general course of action.
  • Curse of the Sea (1/day): He curses a single creature within 120 feet, filling them with the dread of the ocean depths. The target must make a DC 30 Wisdom saving throw or be frightened of Glaucus for 1 minute. While frightened, the target has disadvantage on ability checks and attack rolls, and can’t willingly move closer to Glaucus. Additionally, while cursed, the target takes 20 (4d10) necrotic damage at the start of each of their turns. The curse can be ended early by a remove curse spell or similar magic.

Innate Spellcasting. Glaucus’s spellcasting ability is Wisdom (spell save DC 30, +22 to hit with spell attacks). He can innately cast the following spells, requiring no material components:

  • At will: control water, detect evil and good, detect magic, divination, hold monster, water breathing, water walk
  • 3/day each: chain lightning, control weather, earthquake, gate, sunburst
  • 1/day each: foresight, time stop

Legendary Actions

Glaucus 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. Glaucus regains spent legendary actions at the start of his turn.

  • Attack. He makes one melee attack.
  • Divine Protection. He casts shield on himself.
  • Call of the Sea. He summons a tidal wave that sweeps over all creatures within 120 feet of him. All creatures within the area must make a DC 30 Strength saving throw, taking 60 (10d10) bludgeoning damage and being knocked prone on a failed save, or half as much damage and not being knocked prone on a successful one.

Regional Effects

The presence of Glaucus causes the following effects within 5 miles of his presence:

  • The sea becomes calm, and any storms in the area are dispersed.
  • Fishermen within the area have a higher chance of catching a large bounty.
  • Any creature attempting to swim or move through the water within the area must make a DC 25 Strength saving throw or have their speed reduced by half due to the strong currents.
  • Any undead creatures within the area must make a DC 30 Wisdom saving throw at the start of each of their turns or be destroyed.
  • Once per day, Glaucus can cause a powerful storm to brew in a location of his choice within the area. The storm lasts for 1 hour, and all creatures within it must make a DC 30 Constitution saving throw or take 50 (10d10) lightning damage and be stunned for 1 round.

Currently in the World

Artist Bartholomeus Spranger (1546–1611)

In the time of ancient Greece, Glaucus was born a mortal fisherman with a passion for the sea. One day while diving for fish, he ate a magical herb that transformed him into a sea god. From that day forward, Glaucus became a protector of the sea and all its creatures.

Throughout the centuries, Glaucus has remained a steadfast guardian of the ocean. He has battled sea monsters, protected sailors, and guided lost ships to safety. But his most important duty is to maintain the balance of the sea, keeping it healthy and thriving for all its inhabitants.

In the 1450s, Glaucus is busy observing the rapid changes happening in the world. He has seen the rise of new civilizations and the fall of old empires. He is also aware of the growing threats to the ocean, such as pollution and overfishing. As a result, Glaucus has become more involved in mortal affairs, using his powers to influence human actions and protect the sea.

Despite his godly powers, Glaucus is not invincible. He is vulnerable to human emotions, particularly love. In fact, he fell in love with a mortal woman named Scylla, but their love was forbidden by the gods. Glaucus’ heartbreak led him to make some questionable decisions, such as turning Scylla into a monster.

Glaucus’ greatest strength is his deep connection to the sea and its creatures. He can communicate with all the animals of the ocean, and they in turn will aid him in times of need. His divine trident is a powerful weapon, capable of summoning waves and creating whirlpools.

Glaucus’ relationships with other gods are cordial but distant. He prefers the company of sea creatures to that of his fellow deities. However, he has a special fondness for Amphitrite, the goddess of the sea, and will go out of his way to assist her if needed.

Glaucus’ main goal is to preserve the ocean and its inhabitants for generations to come. He hopes that through his actions, mortals will come to appreciate the beauty and power of the sea and take steps to protect it.

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