How were white walkers created?

Related questions

1. Are there dragon eggs in Winterfell?
2. Who is buried at Winterfell?
3. Who said there are no coincidences?
4. Is Jon Snow a Targaryen or a Baratheon?
5. Is coincidence a fate?
6. What does the Bible say about coincidences?
7. How did Aegon's dragons die?
8. How did Balerion the dread die?
9. What do the white walkers do with the babies in Game of Thrones?
10. Why was night king created?

Tags

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2. #first
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5. #against
6. #years
7. #tribe
8. #slaughtering
9. #sacred
10. #daggers
11. #their
12. #children
13. #create
14. #forest
15. #cutting
16. #protection
17. #dragonglass
18. #walkers
19. #created
20. #chests
21. #white
22. #these