Why was Snape killed?

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Tags

1. #shrieking
2. #orders
3. #potion
4. #elder
5. #dumbledore
6. #served
7. #master
8. #front
9. #harry
10. #hogwarts
11. #bravely
12. #remember
13. #killed
14. #double
15. #snape
16. #shack
17. #thinking
18. #agent
19. #having
20. #battle
21. #nagini
22. #snake
23. #voldemort