The Xit-Xaht Tribe, also merely called Mazzatun was an Argonian organization which historically operated in the city of Mazzatun located in the Shadowfen region of northern Black Marsh. During the Second Era, they were believed to be sickened in the opinion of other Argonians as they were one of the few tribes that continued to build lasting structures if compared to the rest of the race who had adopted a tradition and culture of letting go, something that their own Hist tree did not ask of them.
Xivilai's Clan is a Daedric clan led by Xivilai Moath. It is in the service of Clan Dagon, led by Mehrunes Dagon. The clan is based in the Havoc Wellhead. It represents the ambitious, but occasionally overreaching and imprudent side of destruction.
During the attempted Planemeld, Moath was in the service of Molag Bal, although nothing is known of the clan from that time.
Along with Shardai Clan and Dremora Clan, Xivilai's Clan aided Dagon in his invasion of the Battlespire during the Imperial Simulacrum. At this time, the Morphoid Daedra and the Frost Atronachs were retainers of Xivilai's Clan. On the orders of Faydra Shardai, the Frost Atronachs helped to invade the Shade Perilous along with their hated enemies, the Flame Atronachs. To prevent infighting, Xivilai made a pact with Faydra, forcing them to work together. This relationship did not hold, as an apprentice from the Battlespire, following the retreating Daedric armies, brought the atronachs into conflict over control of the realm. The unnecessary invasion of the Shade Perilous and the increasing rivalry between Faydra and Xivilai displeased Dagon. Imago Storm of Dremora Clan made a deal with the Battlespire apprentice in an attempt to restore order to Clan Dagon. Xivilai Moath was tricked into aiding the apprentice and brought his clan into open conflict with Shardai Clan. Following Dagon's banishment, Imago Storm assumed control and restored order to the clans.
It is unknown what relation common Xivilai Daedra have to the clan.