Walpurgis Banquet

Walpurgis (魔王達の宴) is an event where all the demon lords who are part of the Ten Great Demon Lords, or later, the Octagram, gather. After the proposal, the approval of three demon lords is needed to confirm and schedule it. Absentees have to be prepared to face severe consequences, as this is a covenant established between all demon lords.

In human's point of view, these events happen rarely and are hardly mentioned in human literature. The truth is, there are many instances of Walpurgis gatherings that the humans were simply not aware of due to no impactful decisions being made. Many of the demon lords just regard the gathering as some sort of regular tea party, though in those instances there might actually be several absentees which are treated much more leniently.

The Walpurgis Banquet, in the eyes of the human nations, is typically associated with the beginning of a Great Holy Magic War. The last one being over a thousand years ago and resulted in a myriad of casualties and great calamities. Thus, it is commonly known as the banquet that brings chaos and destruction into the lands.

Demon lords are only allowed to bring two subordinates. There is a reason for this restriction—a long time ago, there was a newcomer demon lord who brought over a hundred individuals to flaunt his power. This infuriated another demon lord who just had her country razed and thus annihilated them to vent her anger. Therefore, they decided that Walpurgis is no place for weaklings and each participants are only allowed to bring two more attendants.

The seating order around the round table was decided based on the order in which one became demon lords.

Walpurgis Banquet: Carrion's Betrayal and Rimuru's Demon Lord Proclamation

 * Banquet proposer: Demon Lord Clayman
 * Supporters: Demon Lords Frey and Milim.


 * Banquet objective: Addressing the issue of Demon Lord Carrion's betrayal of the council, and his co-conspirator Rimuru Tempest's Demon Lord self-proclamation alongside the murder of Clayman's subordinate.

Banquet participants

 * Nine of the current Ten Great Demon Lords:
 * Demon Race............................Guy Crimson "Lord of Darkness"
 * Attendants: Misery and Rain
 * Fairy Race (Pixie)...............Ramiris "Labyrinth Master"
 * Attendants: Beretta and Treyni
 * Dragonoid Race...................Milim Nava "Destroyer"
 * Giant Race..................................Dagruel "Earthquake"
 * Vampire Race...........................Roy Valentin "Bloody Lord"
 * Fallen Angel Race...............Dino "Sleeping Ruler"
 * Winged Race (Harpy).....Frey "Sky Queen"
 * Undead Elf Race..................Clayman "Marionette Master"
 * Attendants: Nine Head and Viola.
 * Former Human........................Leon Cromwell "Platinum Saber"


 * The Newcomer:
 * Slime Race (Demon Slime)........Rimuru Tempest "King of Tempest"
 * Attendants: Shion] and [Ranga
 * Masked participant:
 * Lion/Lycanthrope Race.....Carrion "Lion King"


 * The unexpected Latecomer:
 * True Dragon.............Veldora Tempest "Storm Dragon"


 * The exposed Demon Lord pretending to be a maid:
 * True Ancestor...........Luminous Valentine "Queen of Nightmares"

Banquet Outcome

 * Milim reveals that she was not under Clayman's control, as most of the assembled Demon Lords had believed her to be.


 * Demon Lords Rimuru Tempest, Frey, and Milim exposed Clayman's treachery: the plot with the former Demon Lord Kagali to manipulate the Ten Demon Lords into acknowledging Clayman's invasion of Carrion's territory as legitimate, as well as approving of killing Rimuru Tempest and destroying his newfound country.


 * Rimuru kills Demon Lord Clayman and is officially recognized by the other Demon Lords.


 * Demon Lords ”Sky Queen” Frey and ”Lion King” Carrion step down from the Ten Great Demon Lords. They became ”Tyrant of Destruction (Destroyer)” Milim Nava's subordinates. Milim Nava gained their territories.


 * No longer having ten Demon Lords, the title of ”Ten Great Demon Lords” was changed to the ”Octagram” by Rimuru Tempest.

Newly formed "Octagram"

 * “Lord of Darkness” Guy Crimson (Demon)
 * “Destroyer” Milim Nava (Dragonoid)
 * “Labyrinth Master” Ramiris (Fairy)
 * “Earthquake” Dagruel (Giant)
 * “Queen of Nightmares” Luminous Valentine (Vampire)
 * “Sleeping Ruler” Dino (Fallen Angel)
 * “Platinum Saber” Leon Cromwell (Demonoid)
 * “Rising Star” Rimuru Tempest (Slime)

Trivia

 * Named after Walpurgis Night- said to be when witches congregate.
 * The banquets are their most serious when an upstart proclaims themselves a Demon Lord without the backing of three existing ones.
 * As of the Octogram's naming, only Guy, Luminous, Ramiris, Clayman, Fey and Rimuru brought attendants.
 * Milim never had official subordinates.
 * Dragruel and Dino are loners.
 * Leon prefered to come alone.