After surviving the wrath of Dany’s dragon, she emerges from the ash, bloodied and covered in soot, and discovers a white horse, who has—like her—miraculously survived.

Arya was riding a white horse, and the Bible says Death rides a pale horse. According to the Book of Revelation, the population of the earth will be decimated by the Four Horsemen of the Apocalypse.

It’s also worth noting that Martin attended Catholic high school when he was growing up in New Jersey. In Revelation 6:2-8, John sees a vision of the Four Horsemen of the Apocalypse.

J. S. Considine, THE RIDER ON THE WHITE HORSE: Apocalypse 6:1-8, The Catholic Biblical Quarterly, Vol. 6, No. 4 (October, 1944), pp. 406-422 ...