You are plagued by incredibly detailed dreams, so detailed that you actually glean the future from the visions, either by interaction or observation. You begin to suspect, however, that the dreams are REAL, and that his two worlds will one day collide.
Rivalry: A rival to you or your family cause upheaval forcing you to relocate possibly to a far distant land. (Work with your DM to detirmine the details)
When you become an adult you learn to used a weapon (of your choice) appropriate for your culture and social standing. (work with your DM to determine details)