Board Thread:Speculation House/@comment-35086897-20180411165727/@comment-26397825-20180412011421

There is no indication Amber used her semblance in conjunction with the Maiden powers; we don't know what Amber's semblance is and the writers have never stated it.

And so far all Cinder's Maiden powers have done is allowed her to create more of her semblance, which is apparently the ability to turn ordinary dust into glass. Considering Raven can also make a giant sword, it's not really powering up her semblance at all.