What is the MTG Arena vault?

Related questions

1. Does MTG Arena still have the vault?
2. How much do gems cost MTG Arena?
3. What is a mana curve?
4. How many lands should be in a 40 card deck?
5. How do Planeswalkers work?
6. How many creatures can be in a limited deck?
7. Can you buy wildcards MTG Arena?
8. What is traditional draft MTG Arena?
9. Can you earn gems in MTG Arena?
10. How does MTG draft work?

Tags

1. #events
2. #quests
3. #collection
4. #player
5. #reward
6. #arena
7. #fifth
8. #economy
9. #gathering
10. #instead
11. #points
12. #vault
13. #magic
14. #receives
15. #opening
16. #amount
17. #certain
18. #progress
19. #adding
20. #added