The origins of Onmyou-Dou are Taoism, Ying-Yang and 5 Elementals theories from china. Horoscope, calender and direction are very important in Onmyou-Dou. (Like Feng-Shui in China because they have same root. But many deference also exist.) Ancient Janapease nobles were the patrons of Onmyou-Mage and Onmyou-Dou in Japan was greatly developped. Many higher mystical things are in Onmyou, but they shall be described in higher secrets of Onmyou and Budhism magic.
Ordinaly casting spells is same as Hermetic magicians. But conjuring is different.
Onmyou-mage can conjure Watcher and 5 ways Elementals (Spirits of 5 elementals theory) or Curse spirit (Juso)
Onmyou-mages who conjure 5 ways Elementals are called Ying-Yang Docter and who conjure Juso are called Fujutu User. Fujutu User may not be played as player characters.
5 ways Elementals are below.
Fujutu user makes Juso from painful death. Longer the pain is continued, stronger this crooked spirit become. It costs sacrifice and force * 10 days (pity creature tortured thease days.) to summon Juso. TN is same as the force. If one misses the test to summon, the Fujutu user will attacked the Juso he want to summon and control. Because Juso bears persistent grudge against the summoner. After successful summoning, Fujutu user can devide the success number to shorten the summoning term or to give additional powers to Juso.
The most well-known method to summon Juso is Fuko. Many poisonous insects , lizards and snakes are crowded into small pot and let them to kill and eat each other for several days. Fujutu user waits till all of them but one die. And use the last one as the sacrifice to summon Juso. Any method with cruel and long pain work to summon. Aura of resentment and grudge is the material of Juso summoning. Stronger Juso bears more persistent grudge.
Recent reserchs report that Juso and Blood spirit are nearly being. Juso is toxic being and Fujutu user run the high risk to summon them. Fujutu user change their grudge against whom Fujutu user wish from him.
>Something more terrible often be summoned when trying to summon too strong Juso. But the time has not arrived to tell that is what.
>Yogensya(15:55:36/09-02-58)
>When that being appears , the sacrifice must be human or metahuman.
>Douman(22:02:11/09-02-58)
None can control Juso delicate. Summoner can misdirect them the target of their power of ruin with material same as ritual magic. Juso start to serch the target and bring doom to the target. (Juso is as clever as sacrifice. It will do anything for its purpose.)
A magician with conjuring skill can try the contorll contest to release the Juso from its summoner. Any magician mey not control Juso. Only liberation from their summoner is accepted.
(Released Juso return to its summoner to revenge.)
Juso vanished after it kill the target. It's said that Juso become toxic free spirit if the target is lost forever before killed by Juso.