Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-11254783-20130730030800/@comment-189.128.130.2-20130730052416

After seeing the episode, my conclusion is that, yes, Ms. Blake is the Darach; but she's not Paige, the answer came in the same episode, when Stiles and Scott wonder if the Darach is/was the Alpha Pack's emissary. I believe, in the past, Ms. Blake was a druid serving at the behest of the Alpha Pack, she may have said something that didn't went well with Deucalion (we have been told that what he can't get, he destroys) and so he tried to kill her. Barely surviving, she gather the strength to sacrifice the animals and become the Darach to achieve her vengance against Deucalion…something he knew as the twins said they were to destroy a threat.

As of Lydia being a banshee. A banshee, in folklore, is a faerie that brings omens of death, that's why she always found the bodies.