Thassa

Thassa is a fictional deity from Magic: The Gathering, associated with the planar setting of Theros. She is the blue god of the sea, one of the five major gods worshiped by the inhabitants of Theros. In the world of the game, Thassa embodies the ocean and its moods—calm, capricious, and destructive—and is revered by sailors, fishermen, and sea creatures. Her symbolism centers on water, tides, and navigation, and her temples and iconography often feature aquatic imagery.

In terms of game design, Thassa appears as a legendary divine card representing blue’s sea domain. She is described as an indestructible deity whose status as a creature depends on your devotion to blue. This devotion mechanic aligns with the Theros cycle’s emphasis on color-associated gods and the strategic use of mana commitments to activate divine effects. As a blue deity, Thassa supports strategies that emphasize control, card advantage, and tempo.

Lore and depiction in the cards emphasize Thassa’s dominion over maritime life and the sea’s vast reach. She is part of a pantheon that includes other gods tied to white, black, red, and green mana, each granting broad, color-aligned themes to the decks that feature them. Thassa’s presence in the set reinforces the mythic storytelling of Theros, blending ancient mythic motifs with modern card-game mechanics.

Etymology and usage: The name Thassa draws inspiration from the ancient Greek word “thalassa,” meaning sea. In MTG, the spelling Horous/Thassa is a stylized representation tied to the sea deity concept, and the name appears in various sea-themed cards such as Thassa’s Oracle and related blue-water motifs.