Board Thread:Episode Discussion/@comment-34633327-20180112214926/@comment-34633327-20180114095125

BenRG wrote: That doesn't match up with the repeated warnings Salem gave Cinder that being a maiden made her extra-vulnerable to Ruby. She mentioned nothing about the Grimm biomaterial grafts. This is an inconsistency but one that I suspect will be explained. Except Salem never said it was because she was a Maiden, she said it was because of the Maiden's power. Its hard to catch, but there is a slight difference.

Salem : It is because of the Maiden's power. Make no mistake, Cinder, you hold the key to our victory. But your newfound strength brings with it a crippling weakness.

Had she said "It's because she is a Maiden this happened", then the answer explicitly says that Maidens are weak to SEWs. But as she said "because of the Maiden's power" she could be refering to the former, or be refering to this specific set of powers. Powers obtained by a Grimm. A Grimm that is living inside Cinder.