User blog comment:Eres - Mistress of Illusions/Questions on Dust/@comment-3146930-20131214162454

From what I have seen from the show, the White-Glyph Weiss uses can be used for pushing or pulling an object, as she is seen using the White-Glyphs for both. However it appears that if she is charging a White-Glyph, it will turn black; possibly meaning that it can push/pull with greater force. This can be seen in scenes where she will create a White-Glyph and instantly use it. The Black-Glyph only appears when she is seen charging for an attack (such as holding Ruby back to fire at the Nevermore and when she is about to land the finishing blow on the Boarbatusk.)