Extended metaphor

(Attunement) This weapon can be wielded as a magic weapon that grants a +1 bonus to Attack and Damage Rolls made with it. While holding it, you have a +1 bonus to spell Attack rolls.

If your duplicate is visible and within 30ft you can spend an action to toss your weapon towards your duplicate, as it tosses its weapon to you. A path must be possible between you and your duplicate. You can use your action to have your duplicate make an attack with your spell attack modifier. If your duplicate illusion is disrupted or dispelled the weapon drops to the ground.