Shadow weapon

You can channel a portion of the shadow and syphon it into your weapon filling it with darkness. 

During a long rest, which must be completed while in dim light or darkness, you perform a ritual where you turn one of your weapons into a shadow version of itself. The stats of the weapon remain the same except the following.

•The weapon does proficiency d6 bonus necrotic damage. 

•As a bonus action you can summon or dismiss the weapon as long as you are in dim light or darkness.

•The weapon creates shadow ammunition when loaded.