Bard's Melody

You reach your hand out and upon doing so summon a spectral musical instrument you are proficient with and is able to be used as your arcane focus. This weapon can only be held by the caster and upon giving the weapon to anyone else it is immediately dispelled. Attempting to hit anything with this spectral instrument it will pass through clean and will result in no impact. 

(yes this is basically pact of the blade for a bard)