Board Thread:General Discussion/@comment-28189972-20161129172223

Weiss summoned mainly the sword, plus the arm of the Knight. Her summoning glyph has swords in it. If you look closer at Winter's glyph that summoned the nevermores, it looks like there are stylized birds, or at least wings present.

From what I can tell, The glyph she uses to summon the Beowulf also looks different from the one she uses to summon the birds too

It seems like the image of the summon, or something representative of it, has to be present in their glyphs? 