December 12, 2014 3:35 PM EST

Not to be outdone by J.K. Rowling‘s stories or Santa Claus’s beard, Game of Thrones author George R.R. Martin is also getting into the Christmas spirit.

The author has been tweeting a Game of Thrones-themed Christmas meme for each major house in Westeros with the hashtag #12daysofwesteros

Because in case you haven’t noticed, winter is coming.

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Write to Charlotte Alter at charlotte.alter@time.com.

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