Board Thread:Lore Discussion/@comment-66.243.250.142-20150427025156/@comment-24.206.147.48-20180108201959

Guys it’s not hard to figure out how he became Dragonborn the game literally tells you how anyone becomes dragon born. Akatosh made them that way when they were born. They were born with the dragon blood in them. Their destiny being to kill Alduin, that is their purpose here. No one else except the character you play was able to do it. Thus, making you the last Dragonborn ever. With all that being said, Miraak just happened to be the first one Akatosh created to stop Alduin, which miraak chose not to do.