Fighter's Soul

This is the soul of the fighter, a weapon made from his bearer's deepest desire. It could be a desire to protect his loved ones or to crush his enemies, or anything else. The weapon will mold to adapt to his bearer. This weapon can't be destroyed, stolen or be thrown away from enemies or events in any way and the bearer can summon it in his hands whenever in need.

The weapon doesn't count as "magic"

You must decide which weapon the fighter's soul represent.

It must be a weapon the you have proficiency with. 

Also, you gain expertise with this weapon.