Is killing Paarthurnax optional?

Related questions

1. How many blades can you recruit?
2. How do you get Gorg Xenoblade?
3. How many blades can rex have?
4. How do you change blades in battle xenoblade 2?
5. How do I get the Torna blade?
6. Does Xenoblade Chronicles 2 have anything to do with the first?
7. Can serana be a blade?
8. Who is Pyra?
9. Is Xenoblade Chronicles 2 worth getting?
10. Is Pyra or Mythra better?

Tags

1. #later
2. #point
3. #after
4. #interfere
5. #mission
6. #since
7. #dragonborn
8. #character
9. #possible
10. #hrothgar
11. #essential
12. #directly
13. #paarthurnax
14. #quest
15. #already
16. #alduin
17. #peace
18. #longer
19. #treaty