Did anyone else notice all the ironic deaths that Season 6 did?
(spoilers follow to those who haven't seen up to the end)
First, Roose Bolton. He betrayed Robb and stabbed him in the chest with a knife. Ramsay later kills Roose the exact same way.
Second, Ramsay Bolton himself, at the top of all the "must die in Season 6" lists. He has his dogs hunt girls for sport, and fed his baby brother and Walda to them. In the end, Sansa chooses them as her method of killing him, as he hasn't fed them for seven days, thus, Ramsay goes the way of Scar from The Lion King.
Finally, Walder Frey. His son Black Walder slit Catelyn's throat in his name at the Red Wedding. Then, when Arya returns, the first name she crosses off her list is Walder, and she slits his throat (which, long before that scene came up, I said would be the perfect death for him).