Board Thread:Speculation House/@comment-25266931-20161228024928/@comment-26397825-20161228040507

I believe that the tale was 'some could even kill a Grimm with just a look', not just paralysis. The dragon was frozen because it's huge and old and powerful and Ruby is young and untrained. We can probably assume that Ruby literally killed cells in Cinders body, since she is sharing it with a Grimm, such as one of her eyes.