How did Tony Stark lose his heart?

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Tags

1. #fiction
2. #chest
3. #piece
4. #metal
5. #power
6. #great
7. #science
8. #keeps
9. #reactor
10. #created
11. #killing
12. #fragments
13. #energy
14. #because
15. #magnitudes
16. #capable
17. #second
18. #entering
19. #shrapnel
20. #something
21. #heart
22. #essential