Sheogorath (The Mad God)
Sheogorath, also known as the Mad God, is the Imperial god of Madness and the Tamrielic Daedric Prince of Madness. His dogma is the beauty of creativity and unorthodox thinking according to the Imperial teachings while more fanatical followers follow a more extreme dogma of sowing chaos and madness for it's own sake. It is likely the second interpretation is closer to the god's true dogma. His symbol is a pocket watch that never tells the correct time and sometimes no time at all.
Alignment - Path of Autonomy
Domains - Chaos, Illusion, Madness, and Trickery.
Worshipers - Dunmer, Khajit, Musicians, Poets, Writers.
Dogma
While the rituals of his followers are unknown to most, Sheogorath himself savors the act of driving mortals insane and/or making them perform actions which can be seen as trivial or silly. He is completely unpredictable, and often comments in nonsensical or otherwise socially unacceptable statements. He often refers to the removal of entrails and has a curious obsession with cheese, which is taken to near hysterical levels. Despite being completely mad, Sheogorath displays incredible intelligence and insight. He has also shown to be capable of not only manipulating mortals, but other Daedra Lords as well. Some famous cases include when he manipulated Malacath into killing his own son, defeated Hircine in a battle of beasts, and beat Vaermina at her own game.
Sheogorath's attitude reflects the madness over which he rules. He spreads the madness of the Shivering Isles in Nirn and beyond. As one of the "Four Corners of the House of Troubles," he is known for a rebellious streak. He speaks with an exaggerated mix of Irish and Scottish accents, which is likely to be a stretch from his usual voice for when he is angry.
Worshipers
The Dunmer
Originally, Sheogorath was one of the Daedric Princes whom the Chimer, now Dunmer, revered in their ancient ancestral worship. However, when the Tribunal Temple became the dominating religion in Morrowind, Sheogorath—along with Mehrunes Dagon, Malacath, and Molag Bal—became known as one of the "Four Corners of the House of Troubles." He was said to rebel against the Tribunal, and thus worship of Sheogorath became punishable by death. His role in Dunmeri culture is to test them for any psychological weakness, and is associated with the fear other races have of the Dunmer.
When he rebelled against the Tribunal, Sheogorath tricked the moon Baar Dau, inspiring it to hurl itself at the city of Vivec. Sheogorath justified his actions by claiming Vivec was built in mockery of the heavens. Vivec is then said to have frozen Baar Dau in its descent, and the moon swore itself to the Tribunal's service forever. Today, the Tribunal Temple requires a pilgrimage to this moon, called the Shrine of Daring.
The Khajit
Sheogorath is one of the many prominent Daedric Princes in the culture of the Khajiit people. In the Khajiit myth of creation, Sheogorath is called "Sheggorath." He is known as the "Skooma Cat" in Elsweyr.
The Empire
Sheogorth's status as a Daedric Prince and as a member of the "Four Corners of the House of Troubles" has made his mainstream worship largely taboo. Throughout Tamriel, however, there are small shrines where the devoted worship the madgod in secret.
Holidays
There is one Tamrielic holiday that is at least loosely related to Sheogorath. The second of Sun's Dawn is when Mad Pelagius day is celebrated. On this day there are great festivals and invocations at the shrines of Sheogorath.
Last Week Celebration
Held in the dead of winter, this festival celebrates the changing of one Motavian year to the next. Since the number of weeks in Motavia's orbital year does not divide evenly into sixteen four-week months, this last week is placed "outside" the year in the center of winter. This celebration was established by the first Palman settlers on Motavia and is more or less only celebrated by Motavian-born Palmans and those who immigrants who identify strongly with their new home.
To an outsider the Last Week Celebration appears to be chaotic and prehaps not a way civilized people should behave. It is common courtesy that anything that happens during the Last Week Celebration does not reflect on one's self for the rest of the year, and thus there is a good deal of "cutting loose" by people who would otherwise not do so. Despite this custom, people do not often so loose control of themselves that a social disaster strikes. If someone decides to murder another person during the Last Week Celebration people aren't going to let that slip by!
For the most part, the lowered inhibitions result in single people getting more dates, stomachaches from eating too much, and excess nausea from excess alcohol. The celebration might not look sophisticated from the Palman-bred Palman's point of view, but it's one way to keep warm and active during the coldest week of the year.
Relationships
While most gods do not consider Sheogorath to be an enemy he is also an outcast with most gods choosing not to associate with the Prince of Madness. The Tribunal are directly opposed to Sheogorath and the other Daedric Princes of Tamriel and even the other Daedric Princes tend to steer clear of the Mad God so as not to get swept up in his madness.
Realms
The shivering Isles are whatever Sheogorath wills them to be; inside the gates of the exotic and twisted land boasts striking new wildlife (unseen on Nirn) and the oddest oddities of creatures, including Baliwogs, Grummites and the deadly Scalon.
The government is split into three factions: Duke of Mania, Duchess of Dementia and Sheogorath himself. The names are self evident when looking at Dementia's Crucible and Mania's Bliss
The Greymarch
At the end of every Era, Jyggalag is allowed to take on his true form once again, and bring order to his realm, an event known as the Greymarch. After the Greymarch, however, he is transformed back into Sheogorath, who spreads madness upon the realm once more. If Jyggalag were ever defeated during the Greymarch the cycle would be broken. This releases him from his curse, allowing him to remain in his true form instead of transforming back into Sheogorath, however the unfortunate soul that slays Jyggalag will be cursed to become the new Sheogorath.