How is Tom Riddle the heir of Slytherin?

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Tags

1. #emblazoned
2. #borns
3. #became
4. #opened
5. #gaunts
6. #slytherin
7. #owned
8. #known
9. #letter
10. #legend
11. #chamber
12. #marvolo
13. #riddle
14. #descendants
15. #locket
16. #muggle
17. #basilisk
18. #least
19. #heirloom
20. #attack
21. #revealed
22. #salazar