Dagon, the Demon Cat
Dagon (or Daegon) the Demon Cat, also known as Merrunz the Fire-Cat (or Mehrunnez) is the Khajiiti version of Mehrunes Dagon. A child of Fadomai's Second Litter, Merrunz became "destructive and wild", and was exiled by his father, Ahnurr. Rather than the Many Paths, he chose to explore the Great Darkness, and there was captured by Molagh and tortured until the creation of the World. It is said he was eventually freed by Molagh's wife, and used to assault the Lunar Lattice. As a result, Merrunz happily became a kinslayer, and as a result is now known as the demon Dagon.
Dagoth Ur, Father of the Mountain
Dagoth Ur, also known as Voryn Dagoth and the Sharmat, was the immortal Lord High Councilor of House Dagoth, who dwelt beneath Red Mountain with his kin, the Ash Vampires, and legions of Corprus monsters. As a mortal, Lord Voryn Dagoth was one of the few who knew about the Heart of Lorkhan, together with Vivec, Almalexia, Sotha Sil, and their leader, Lord Indoril Nerevar. Dagoth claimed that the Dwemer high priest Kagrenac was drawing power from the Heart using special tools to create a mechanical god, Numidium, that would be used against the Chimer. After Azura confirmed Dagoth's story, action was taken to stop the Dwemer, starting a war that culminated in the disappearance of the Dwemer and the transformation of the Chimer into the Dunmer. The Tribunal's ambition proved to be disastrous, despite the many great and heroic deeds they accomplished in their divine states. In 2E 882, as the Tribunal journeyed to Red Mountain to renew their connection to the Heart in a bathing ritual, they once again encountered Dagoth Ur, reborn to a new incarnation, and with divine power that could more than match their own. Unable to enter Red Mountain's Heart Chamber, they were forced to retreat. Dagoth Ur had sole control of the Heart from this point on and grew stronger while the Tribunal grew weaker.
Later successes allowed Dagoth Ur to expand his sphere of influence further: at first to nearby Dwemer citadels, and then even further by means of spreading blight diseases. In 3E 417, the worst blow came: as part of a misguided attempt to recapture the Dwemer citadels, Almalexia and Sotha Sil lost the artifacts Sunder and Keening, two of Kagrenac's Tools, and had to be rescued by Vivec. Eventually, the Tribunal was forced to retire from their previously active lives and devote most of their time to maintaining the magical Ghostfence they erected to prevent Dagoth Ur's sphere of influence from spreading. Even this was only a partial success; blight-infected creatures could fly over it, and there was a passage below the ground to the lost Dunmer Fortress of Kogoruhn, the stronghold of House Dagoth in life, through which other diseased and Corprus-infected creatures could escape Red Mountain.
Now possessing only one of Kagrenac's tools, the gauntlet Wraithguard, the Tribunal could not - dared not - even pass the bounds of their own Ghostfence to recapture the others. As Sotha Sil and Almalexia withdrew from the world, Vivec stood alone in maintaining the Ghostfence, an effort that took so much of his energies he could not stir out of his palace, and his Temple's Ordinators ran out of his control and became ever more fanatical and rigid as the faith of the Dunmer wavered. Meanwhile, Dagoth Ur set about constructing Akulakhan, the Second Numidium, a brass machine god he would use to conquer all of Tamriel.
For more information, see the main lore article.
The Deep Ones
The Deep Ones are a race of beings who dwell deep underground beneath the town of Hackdirt, an isolated settlement in Cyrodiil's Great Forest. They are worshipped as gods by the inhabitants of Hackdirt, who built the Chapel of the Brethren in their honor. Worshippers who have changed the most are known as the Brethren, and dwell underground in the Hackdirt Caverns to be closer to the Deep Ones. The other residents descend down into the caverns at night for "Gatherings" where they worship the Deep Ones; tunnels were dug connecting each house to the caverns for this purpose.
Diagna, Orichalc God of the Sideways Blade
Diagna, (also known as the Orichalc God of the Sideways Blade) was an avatar of the HoonDing (the Yokudan God of Make Way) that achieved permanence as a Redguard sword-god. His "hoary thuggish cult" originated in Yokuda during the Twenty Seven Snake Folk Slaughter. He was instrumental to the defeat of the Lefthanded Elves, as he brought orichalc weapons to the Yokudan people to win the fight. In Tamriel, he led a very tight-knit group of followers, called the Order of Diagna, against the Orcs of Orsinium during the height of their ancient power, but then faded into partial obscurity. He is described as now being little more than a local power spirit of the Dragontail Mountains but he is still worshipped as of the 4th Era, being part of the Eight of the Crowns.
High Kings of Hammerfell are crowned on the Throne of Hegathe by wearing the Diadem of Diagna. Warriors of the Order of Diagna carried armless stone effigies of Diagna during the siege. The Daggerfall Covenant's alliance of the Orcs and Redguards was alleged by the Unveiled Azadiyeh to have inflamed Diagna's very sword-arm with the Crimson Rash of Betrayal.
Dibella, Goddess of Beauty
Dibella, also known as the "Passion Dancer", "Our Blessed Lady", and simply, "the Lady", is the Goddess of Beauty, Love, and Affection. She is also acclaimed as the Lady of Love, Beauty, Art, and Music. Dibella is the Queen of Heaven, and is one of the Divines.
Druagaa, Goddess of Flowers
Druagaa is the old goddess of flowers, worship of whom has all but died out. A festival named Gardtide is still held in her honor on the 1st of Rain's Hand every year by the people of Tamarilyn Point, a coastal region of Menevia in central High Rock.