Sansa wants Jon to assemble the Northern houses against Ramsay in Book of the Stranger .
When Tormund ( Kristofer Hivju ) warns him that the wildlings do n't have the numbers to battle Ramsay 's army , Sansa points out that Jon can use his status as the son of the `` last true Warden of the North '' to unite the various Northern houses.
Book of the Stranger