User blog comment:IamJakuhoRaikoben/Chapter 412: Dance Unto Ishgar, Review./@comment-203.215.120.147-20141209072342/@comment-7418318-20141209101534

Due to LH being kept secret at the top level I wouldn't worry about it going against the council laws. Besides, judging by what happened in Zero the council seems to have been pretty toothless at the time when LH was created.

What I think is more pertinent to the matter is that the R-System required a sacrificial body of sufficient power and a LOT of magic power on top of that. I took a shot of Etherion to fuel the revival of a single Human being and two Dragons are almost asuredly taking even more magic power. Plus the availability and moral matter of the sacrificial bodies.