What was the symbol the night King left?

Related questions

1. How did Dany get dragon eggs?
2. What does ygritte say to Jon Snow?
3. Who killed qhorin Halfhand?
4. Why did ygritte shoot Jon Snow?
5. What is the White Walker symbol?
6. Who does Jon Snow fall in love with?
7. How did White Walkers get created?
8. Is Jon Snow brother to the Dragon Queen?
9. Why did Jon kill qhorin Halfhand?
10. What episode does Jon Snow and Ygritte make love?

Tags

1. #mormont
2. #island
3. #confused
4. #lyanna
5. #which
6. #night
7. #served
8. #exactly
9. #umber
10. #anything
11. #younger
12. #audiences
13. #stands
14. #westeros
15. #dondarrion
16. #symbol
17. #explained
18. #queen
19. #warning
20. #beric