Editing Kensei/Rules And Tactics/1e (section)

==Magic==
Players who choose to use magic must first select their alignment from Infernal, Celestial, Earthly, and Death,  then which of the two disciplines available to each they will use. If you field multiple Onmyouiji, you must use the same choice for both. Magic cannot be used without an Onmyouiji. 
Onmyouiji maximum strength available determined by the size of the battle. Even if you can afford the Koku, you can't bring too elite an Onmyouiji to a smaller battle. 

Shikigami, the two models that come with each Onmyouiji, are extensions of the Onmyouiji. They are purchased with Koku and share the limit on maximum levels for Creatures and Onmyouiji you can field, but give you a special model with nifty abilities that can cast spells like the Onmyouiji and have a better stat/cost ratio than most Creatures. They operate independently of the Onmyouiji, and can go fuck off and do whatever on the battlefield. If the Shikigami dies, the Onmyouiji takes an immediate Wound, if the Onmyouiji dies their Shikigami immediately die as well. 
If a Shikigami casts a spell, the Onmyouiji loses one Action Point and the spells they themselves cast for the next turn have a penalty of -1 Ki. Shikigami can't cast spells higher level than themselves and can't cast spells with variable durations, but otherwise cast by themselves the same as their master would (but using their own stats), allowing you to gain a whole extra set of spellcasting attempts.