Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-142.197.75.130-20130725132827/@comment-151.225.126.87-20130730220527

I reckon the oak is just to symbolise that Lydia is the Wise Oak to oppose the Darach's Dark Oak. When the Darach revealed lydia was a Banshee, she said she was the same as her, maybe Blake was the same as Lydia before she went down the wrong path?

If this is right, I think Lydia will be important to beating the Darach