Board Thread:Speculation House/@comment-3146930-20160522215152/@comment-3146930-20160523010131

At the same time using the opening, if Raven is one of the maidens and ends up being killed later down the road, Yang may inherit the power of the maiden as a kind of power upgrade. I mean Weiss is starting to learn how to summon her familiar, Ruby just found out she has weird silver eye powers, and Blake may gain something next season after she finds herself. Maybe all of them will gain the power of the maidens.

As you said, it could just be her semblance or possibly Dust, but Dust seems to be based more on nature. Also in the dream scene we see her eyes change like Yang's and during one of the interviews, they mention a Semblance may be genetic; so her semblance may be like Yang's and not portals. However it is a dream so there is no way to know what is true and what is not. It could just be a type of power we don't know about yet, like how Ruby's silver eye powers are mentioned but we don't know where they come from.

Really until we know, this is all just speculation, mainly based on the use of the vortex and because Neo didn't even try to take down Raven despite being one of the most overconfident fighters in the show so far.