Re: Game Of Thrones season 8
Arya's wolf's pack and/or Bran worging into some from the north and bringing them to Winterfell.
I thought direwolfes in this universe are supposed to be extinct? When Arya and Nymeria reunited in s7, Nymeria was with regular wolfpack, not with other direwolfes. And I'm sure they hinted that White Walkers destroyed and turned every living creature in the North.