Thassa, God of the Sea Character in Ravnica: The Overlord | World Anvil
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Thassa, God of the Sea (Thas-Uh)

"When the sea god Thassa wishes to speak with a mortal, she does not issue a summons or grant a vision requesting a visit. The sea simply brings her guest before her."
Thassa mythos

A god of the forgotten seas.

Table of Contents


Thassa is the god of the sea and is also associated with aquatic creatures and the secrets of the briny deep. She is also the god of ancient knowledge, murmurs, gradual change, introspection, vast distances, long voyages, and far-ranging searches. Thassa can also be described as the god of patterns, such as tides, currents, ripples in water, and even the passage of time.   Thassa is the god who is least likely to be satisfied with the status quo, but in the meantime she is also the least likely to rush to change. She works slow, eventual, unfolding change to everything by resculpting the land, changing coastlines and upending institutions. When she speaks, she usually does so in the future tense, always referring to what tomorrow will bring and uninterested with the reality of today. Thassa is slow to anger but implacable once roused. Her anger grows like a rumbling, cresting, unstoppable wave, destroying whole villages with its fury — then subside with the tide, dragging the evidence of her wrath out to sea.

Thassa, Deep-Dwelling by Zack Stella




As Ravnica was created, so too were the gods. Heliod gave heat and light to the world. Purphoros gave meaning and creation, he forged the mountains and landscapes. Nylea grew the forests and created the animals that lived in them. Erebos made an end to all things, ensuring that world would never stale. Thassa filled the world with water and oceans. She took pride in the expansiveness of her work and enjoyed watching the sea creatures swim in her waters, but loathed the dry-walkers that brought their boats and hunted her pets.


Unlike other gods, Thassa may find herself cut off from the mortal world for some time. Not by any purposeful reason, she simply likes to spend time adrift in the currents. During the long lapse of her blessing, a pretender rose to take on the image of Thassa, a mortal named Kiora who had happened to come into possession of Thassa's personal weapon, the bident Dekella. Kiora sought to fight and kill Thassa with the help of the weapon, that of which can control the giants of the sea. Thassa brought her own titans however, and a fierce battle was fought. The conclusion of the fight ceased with Thassa impaling Kiora with Dekella, but as Kiroa gasped her final breath, she cast a spell to take the prized weapon with her to the afterlife, leaving Thassa unarmed. She would eventually turn to Purphoros to construct a new weapon.


Ravnica was not kind to Thassa. For the first layer of the world, now known as the Undercity, lay the foundation to build over the vasts seas of the planet. Any trace of the sea has long been forgotten, save for the Simic opening of Zonot holes that reach down to the dark beaches and ocean waters for research and tourism. Thassa is well aware that she is being buried in the past, but her waters are slowly eating away at the pillars of the city above. In time, when the pillars fail and miles of city crumble into the ocean depths, she will be remembered and worshiped for ages to come, and it has already started.

Worshiped by

Simic Combine  

Mana Alignment


Holy Weapon


Divine Symbol

The endless current  

Sacred Animal


Religious Colors

Blue, White, Red  


Water, The Ocean, Knowledge, Change, Patterns, Patience  

Professional Skills

Skills that Priests may teach at major temples and gatherings
Devotion, Exhort, Seamanship


Clerics of Thassa are given access to the powers she offers. Some miracles are restricted to more trusted or higher ranking members of this religion.

Beast Form
Breath Water
Cloud Call
Dismiss Elemental
Dismiss Magic
Elemental Summoning (Water Elemental)
Heal Body
Heal Mind
Heal Wound


True worshipers of Thassa follow her commandments carefully, with those who ignore or are ignorant of such laws may find themselves praying to deaf ears, or worse.

  • Do not pollute the seas.
  • Do not turn your back to the ocean.
  • Fight not against the currents, let them take you where they want you to go.
  • Sea food for a supper gives you a healthy mind and a restful sleep.
  • Be patient, but be decisive when the time is right.

Thassa's Ire by Chris Rahn

Thassa's Ire

  "The sea is already treacherous and unpredictable, you also have to hope that Thassa ignores you."
— A sailor.

Night of Luna

Every month on the full moon, worshipers of Thassa would hold small festivals on the beaches of her seas to celebrate and offer tribute of fish, salt, pearls, and nacre followed by murmured prayers and quiet contemplation by all to their god. As the Zonots started to begin to open, interest in Thassa and the oceans began to rise, and the once forgotten god found new followers. Ancient books were rediscovered, and the traditions of this god were applied to the small but growing creed. On the day of Luna, many of her followers will travel into the Zonots to try and appease Thassa on the beaches that were abandoned so long ago.

Planar Encounters

Thassa isn't a common god to see in the mortal realm. If she wishes to seek an audience, you will know it. Her emissary is that of the simple crab, for the creatures of the deep will gladly do most of her work for her. The krakens would crush ships that would annoy her, raging storms would drown those her insult her, and tsunamis would wipe away any stains that littered her beaches.

Thassa's Emissary by Sam Burley

Thassa's Emissary


Temples and Shrines

As Thassa is being rediscovered by the Ravnican people new temples are being constructed on the beaches held by the Simic. These temples are decorated with shells and undersea treasures found by deep sea divers. The air is filled with the smell of cooked sea food, and grand mosaics of pearls are created in the image of the beautiful Thassa.

Griptide by Adam Paquette

Thassa pulling a mortal into the sea for a summons.

  “Not only was it terrifying, I got sand in places that I really didn't want sand.”
— Ler'on, a mortal to spoke with Thassa.


Thassa and Keranos are close friends. When Thassa's anger brews, Keranos gladly conjures brutal storms and playfully strikes the ocean with his lightning, attempting to hit those who venture into Thassa's oceans without her permission. Clerics of these faiths are often seen as friends and work well together.

Thassa has a pure hatred of Ephara, for Thassa blames her for the city-lust of Ravnica that had built over her beautiful oceans, not once but twice. It is impossible to have devotion to both of these gods at once.

Thassa has no strong feelings for the other gods.


Tritons and the humans comprise most of Thassa's worshippers, as well as all who venture out to sea, whether for exploration, commerce, or war. Despite the tritons exalting her above all other gods, she shows no favoritism toward them, being equally impassive to all mortals. Thassa is worshipped with offerings of fish and salt by the poor, offerings of pearls and nacre by the rich, and with murmured prayers and quiet contemplation by all. When Thassa wishes to see a mortal, she does not issue a summons or grant a vision requesting a visit: the sea simply brings her guest before her.


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