User blog comment:Zathronas/Speculative Author - RWBY Relativity/@comment-25396609-20160225025456/@comment-25396609-20160225033301

Magic is magic, it defies explanation. But it does follow ruls. its own set of rules, mind, but there are always limits.

In the case of the Maidens power, the circumstance of its genesis are what bind it. The first maidens were all young women, so the power will only go to young woman.

The wizard who gave them their power had his thoughts on them when he transferred his power, so it is tranferred with the thoughts of the current host.

The soul acts as a simple anchor, as it is an indicator of life. When the soul fades the magic will seek a new, living host.