Flower of Maize

The Flower of Maize (フラワーオブメイズ), or F.O.M for short, is a proxy war between Shaman Kings that sometimes occurs after the Shaman Fight. If more than three previous Shaman Kings disagree with the new Shaman King's plan, they choose teams of shamans to represent them in a fighting tournament.

About
When three or more members of the G8 raise a complaint against the current Shaman King, they will hold a summit to contest the Shaman King's actions. If they are unable to agree, a tournament is held with teams fighting on behalf of each member, as a fight between the Kings themselves would easily destroy the planet.

Each Shaman King has to choose five members: one General (大将) and four Captains (隊長). The Generals can choose up to two Helpers (補佐), while each captain can pick up to three Soldiers (兵). There are no limits on the numbers of Guardian Ghosts for the teams. Although the Helpers and Soldiers can be changed at any point, the original five members (General and Captains) cannot be changed once the tournament is underway and if any of them are killed, it is strictly forbidden for the Kings to resurrect them.

The tournament itself takes place on the moon, and the chosen teams travel there on the night when the Earth and the moon are at their closest to each other.

History
After Asakura Hao became Shaman King, YVS and four others disagreed with Hao's plan for the future of humanity, so a Flower of Maize was set for September 9, 2014.

Miracle Prize
Each member of the winning team is awarded a Miracle Prize (きせきのほうび) and can ask their Shaman King to fulfill any wish they might have.

Trivia

 * The tournament's name refers to the "blossoming of an ear of corn" (トウモロコシの花), which will make sense for those who reach the end, according to Rutherfor.