Warning: This post contains spoilers for season seven of Game of Thrones. “Ravens. We need to send ravens,” Bran Stark said at the beginning of “Eastwatch,” the action-packed fifth episode of this season’s Game of Thrones. Bran had just warged and seen a flock of ravens flying north of the Wall — and when he opened his eyes back in Winterfell, he told Maester Wolkan they needed to dispatch ravens.