Why did Arthas take frostmourne?

Related questions

1. Can you fly in Northrend at 60?
2. What is Zone level?
3. What level is Northrend?
4. How do I get to Northrend?
5. How old was Arthas?
6. Why is Arthas evil?
7. What level is Cataclysm?
8. What level should I be for Wrath of the Lich King zones?
9. What level is thousand needles?
10. How do I fly in Draenor?

Tags

1. #uther
2. #wrenched
3. #terenas
4. #ganis
5. #searched
6. #muradin
7. #burned
8. #would
9. #ordered
10. #arthas
11. #boats
12. #lordaeron
13. #frostmourne
14. #process
15. #screw
16. #killing