Board Thread:Speculation House/@comment-3146930-20160522215152/@comment-3146930-20160522232003

The reason I don't think it was the Grimm is that when the Grimm appeared from the glove, there is a type of vortex but it is completely red with no black to it. The black and red vortex doesn't appear until after Cinder starts to steal her power. There also aren't any Grimm around when Raven creates her own vortex. Plus if he got the powers around the time Yang was born, she would meet the requirement of being a young maiden.

On the other hand, those vortexes could symbolize actual magic, as there are other things out there besides Aura and Dust; as shown with the power of those with silver eyes. Also the story itself of the four maidens centers around an old wizard with actual magic.