Board Thread:Speculation House/@comment-14138255-20151213162620/@comment-24993958-20151223123045

BlissCloudz wrote:

... That strange glowing that went on when Yang punched him, I'm starting to wonder whether or not that was him using the last of his aura to activate his semblance...

We have confirmation during a live stream, from Miles no less, that what we saw was Merc’s aura breaking cause he was on the 0; he further clarified that Weiss getting sod all over her happened cause her aura reached 0.