"No more Starks to bow and scrape to."
As Stark and Tully men are slaughtered outside the Twins, the Hound grabs a Frey banner and rides through the chaos with Arya Stark in his arms. Arya regains consciousness to see a group of Frey knights surrounding a rider: Grey Wind's head sewn onto Robb Stark's corpse.
The next morning, Roose Bolton reminds Walder Frey that the Blackfish escaped. Frey doesn't care; with Edmure Tully as his prisoner, Walder is now Lord of Riverrun. Bolton, now warden of the North, says he will not move to Winterfell - it's still in ruins. Lord Frey asks what happened there and Roose tells him his bastard son Ramsay has been keeping Theon Greyjoy captive.