menace of the , a powerful Japanese financial group related to the Onmyoudou ; attempting to open the four ; and freeing , a boy who was born with the power to control , and had been imprisoned for thousands of years. The Shikigami Onmyō Taisenki shows monsters called Shikigami. There are 24 families of Shikigami (three per family for a total of 72) to represent each Solar term. These monsters are extremely powerful, and their are activated when their owners use certain sequences of In. Every Shikigami has its own In sequences and some have special weapons, which are also activated by the In. Every Shikigami has its own name and a class/family. For example, the name Byakko no Kogenta means Kogenta of the , one of the four Japanese great Gods; the other three are , , and family. Class names are usually named after gods and flowers. The Shikigami can transform into a , which is a giant and extremely powerful form where they usually go berserk. Although Nazuna says that a true Daikōjin occurs when Mind-Technique-Body are together, Riku has been able to summon one when he is highly desperate and emotional (usually when Kogenta is about to be killed). Shikigami can also transform into Daikōjin form by forcing a Tōjin stone into a Shikigami, as Isou does to his Shikigami, Fuji, in Episode 20 (or by inserting a special chip made from the Tōjin stones into the drive). However, these methods only produce a confused and pained Daikōjin and causes the Drive to sprout coils that will eventually kill the Tōjinshi if the Daikōjin is not defeated. In addition, members of the obliterated sect Jin-ryū have been able to change their Shikigami into Daikōjin by using lengthy series of In. Later in the series when Kogenta and Rangetsu were fighting together against Mikazuchi, both Riku and Yuuma gain the Master Drive and their partner Shikigami are able to transform into a , where the Shikigami still have their sanity but a different appearance. Later, Kibachiyo and his partner gain the Master Drive and could also transform into a Chōkōjin. When a Drive is activated for the first time, the Shikigami will appear behind a shōji and asks what the owner desires, and if it is to the Shikigami's liking, it will accept and a contract will be formed. Once the terms of the contract have