Which Dragon died in Game of Thrones?

Related questions

1. Why was daenerys called khaleesi?
2. What are the names of the Dragons in Game of Thrones?
3. What are the names of the 3 dragons?
4. Is Jon Snow father of dragons?
5. Why is khaleesi and Daenerys?
6. What did khaleesi name her dragons?

Tags

1. #dragon
2. #zombie
3. #season
4. #rhaegal
5. #remaining
6. #drogon
7. #sibling
8. #happy
9. #night
10. #viserion
11. #winterfell
12. #memories
13. #after
14. #heaven
15. #battle
16. #wight
17. #killed
18. #turned