User blog comment:IamJakuhoRaikoben/Chapter 354: Ephialtes, Review./@comment-14241224-20131004122933/@comment-7418318-20131004125108

I agree, that's why I put the "I have the feeling" in front.

If the target had to go through this painful procedure and potentially be turned into a shikigami just for a temporary power boost, it wouldn't be very useful.

Also why cast the spell now and not immediately before the combat, if it's only temporary? Maybe just to test if they are able to deal with it, but that's still a big odd.