The Mabrigash Tribe is an Ashlander tribe that lives in the Vale of the Ghost Snake, in the Deshaan region of mainland Morrowind. The tribe is predominantly female, and worships an entity known as the Ghost Snake. Members of the tribe are required to follow the Coiled Path as a coming of age ritual, by walking through the treacherous swamps of the Vale while avoiding the giant snakes and the angry ghosts of those who failed. Unlike other Ashlander tribes, they are led by a Farseer rather than a wise woman. The Mabrigash were traditionally xenophobic and isolated, refusing contact with the outside world.
In 2E 582, a Hlaalu trading caravan attempted to make contact with the tribe to trade for snake skin. The Hlaalu envoy, Raston Vendil, managed to insult the entire tribe with his lack of etiquette and was taken prisoner. The Mabrigash implored the Ghost Snake for advice, but the spirit insisted that the choice was theirs: accept trade with the outside world, or remain isolated. It is unknown which path the tribe took, but the contact with the traders had irreversibly changed them.
By 3E 427, the term mabrigash had come to define a renegade wise woman who had forsaken tradition to master the dark arts and become a witch-warrior. They were known to obtain their power by charming a man and draining him of his vital essence, and could manifest their power as a ghost snake which would paralyze and drain their victims. These witch-warriors were common on the island of Vvardenfell, but it is unknown how they relate to the tribe of the Vale.