How do you unlock a Scion?

Related questions

1. What is a scion in Path of Exile?
2. Can I play Path of Exile?
3. Will path of exile come to ps4?
4. How many characters can you have in Path of Exile?
5. What are leagues in Path of Exile?
6. What are leagues path of exile?
7. How many skill points do you get in Path of Exile?
8. What is SSF Poe?
9. How long do Path of Exile leagues last?
10. How many classes are in path of exile?

Tags

1. #complete
2. #heroes
3. #normal
4. #available
5. #character
6. #start
7. #consists
8. #quest
9. #level
10. #scion
11. #difficulty
12. #class
13. #least
14. #three
15. #exile
16. #currently
17. #unlock
18. #seventh