You are magically transported to your current location, a land far away from where you were born. Any family or friends are left far behind, This event makes you a foreigner in the land in which he now dwells. (work with your DM to determine details)
Martial training: In adolescence you trained with the weapons of your people and learnt how to use them proficiently (work with your DM to determine details)
A potent conjunction of the stars and planets occurs on your birthday. you are struck by a falling star which passes through your body like it was made of mist. you awaken feeling different, as if something has been awakened from within.