And because I was bored/reading. I will post here for benefit. All information was pulled from the Guild Wars Wiki.
Mad King Thorn is a former king of
Kryta, known for his jokes and his insanity. Although it is unknown when he lived, much is known about his reign. During his reign, Kryta suffered a severe famine while Thorn held exquisite banquets for his courtiers. This made him unpopular with the commoners, an effect he exacerbated by once having a number of villagers skinned alive. He traveled to Elona on multiple occasions and is said to have had "many squabbles over the years" with
Palawa Joko, who was an "up-and-coming king in
Elona" at the time. (This was revealed in a set of quests in Halloween 2010, where the player went to incite a feud between the two again, to keep "Grenth busy with paperwork, categorizing souls, so that he would not notice Mad King's return")
He hates the
Tengu,
Harpies, and
Ettins (Ettins especially, as there was a quest in where you went a killed off a certain group of ettins that MK had banished years ago to Perdition Rock) but fears termites.
He once had a spat with
Qwytzylkak. (This is an eidoln, that apparently was a rival of MK in terms of humor, again there was a quest in which you were sent to exterminate him in Venthendi Valley. His joke (written in that crazy language also seen in the Durmand Priory) was Why did the Seer chase after the eidolon? Because time was of the essence!)
Thorn was married eight times, though only the identity of the fifth bride is known: During a trip to Elona, he married the
Istani princess
Zola, having convinced her to accept him by holding her father hostage. It is said that wars followed after he had her burned alive—a low point in their marriage. (You meet and successfully "free" her from other suitor spirits preventing her leaving Elona "again". After doing so, she admits she wants to be the FIRST one to send her crazy husband back to Grenth.)
His cruel and insane rule was ultimately brought to an end when an enraged mob stormed his castle. Many of his staff fled, leaving him to his death, which was effected with a carving knife. After his death, the mob is said to have been "very creative" with his corpse. Afterwards, his palace and most of his possessions and courtiers were set ablaze. (In another quest, you are actually sent out to recover his body (from the mauseloum in Majesty Rest) only to find out it's not really his body, since the original was so messed up. But any royal body will do

.
You are also sent to retrieve 3 artifacts/herilooms to assist in the ritual. They were:
- Most Prized Half-eaten apple from his saddlebag (From Bryce the Stablehand)
-MK's left slipper (from Geoffrey the Butler)
-MK's copy of "Moa Soap for the Demented Soul" (from Guardsman Brofis the Deserter)
These were said to be used for the ritual of bringing him back as ("didn't we always send junk around other altars? We figured we needed stuff too" -Countess Hakewood)
As a spirit (often referred to as a "Spirit Lord"), he lives in the "Mad Realm" within
the Underworld and, because of a series of seals restricting him, (Question is : How many? ) he is able to return to
Tyria for only one day each year:
Halloween.
The
Lunatic Court are attempting to break the seals and bring Thorn back as an
undead. The first seal was broken when
Salma took the throne.
When Halloween approaches, Thorn's influence seeps through into Kamadan and Lion's Arch, transforming the citizens into assorted monsters. He is generally accompanied by
Candy Corn servants.
Also, because of the jokes and weakening of seals, it caused the "Flux" to begin in PvP. Since the seals were weakening, it was causing areas more close to the barriers of Mist to flux, causing these problems.
Edited by Orual Fox, 17 October 2012 - 06:43 PM.