Chromatic Ammo

Cantrip: Chromatic attack?
Casting time: 1 action
Duration: Instantaneous
Components: S,M

As part of casting this spell you make a weapon attack with a weapon.
You can pick one of the following elements -acid, cold, fire, lightning, poison, or thunder - and change the dmg type of your attack.

At level 5 you also deal an additional D6 of the appropriate elemental dmg. This die goes up again at lvl 11, 17.

this would stack with sneak attack allows you to change elements adds at max lvl 3d6 - scales regardless of your class (neat) leaves your attunement slots open for magic items cuz artificer! and infusions! _