Chromatic Bow

You bend light into your ally, forging a bow to strike down your enemies. As a bonus action, you summon forth an illusory bow that shifts in the light. When you take the attack action, all attacks can be made with the bow. The bow does 2d6 acid, cold, fire, lightning, poison or thunder damage on a hit and you may change the damage type with every attack. The bow uses your spell attack modifier. 

At Higher Levels. When you cast this spell using a 3rd- or 4th-level spell slot, the damage increases to 3d6. When you cast it using a 5th- or 6th-level spell slot, the damage increases to 4d6. When you cast it using a spell slot of 7th level or higher, the damage increases to 5d6.