Board Thread:Speculation House/@comment-1173941-20130216005034/@comment-184.89.38.5-20130222182351

If you watch closely, all Weiss does is jump onto the sword. I think yellow is wind magic, that not only blows away the sword, but also the ice from the previous attack. The shards we see after the slash are the ice. It after she switches to purple she lays the trap, though whether that's her own magic(if she even does have her own) or the sword's is debatable. Purple may be the binding magic.

And as for the final slash, you can see that all the visible slots shine white. That final attack could be a combination of all of them. Though I do agree that basic white could be time manipulation.