Board Thread:Lore Discussion/@comment-1600847-20130821212751/@comment-7153552-20130822213534

So that means there were 15 made by Sithis (or variant name), which is a good round number. Boethia got all pissy and made Malacath, a bunch of the Deadra got together and were afraid of Jiggy (na na na na, na-nah na) and made the MadGod as a very cruel and unusual punishment. Sheogorath turned around and got the ultimate revenge (after several Eras) and released Jyggalag upon Oblivion and the rest of creation once again! Go, Sheo, go!