How did Rhaegal die?

Related questions

1. Who created the Night Walkers?
2. Who Wrote Season 7?
3. Is Season 7 the last season for Game of Thrones?
4. Are Jon Snow and Daenerys siblings or cousins?
5. Why does Season 7 have less episodes?
6. How many episodes are in season 7 of Game of Thrones?
7. Who is the king of seven kingdoms?
8. Who sits on Iron Throne in the end?

Tags

1. #drogon
2. #wight
3. #season
4. #dragon
5. #rhaegal
6. #turned
7. #viserion
8. #battle
9. #winterfell
10. #remaining
11. #after
12. #night
13. #killed