Duckworth's Swiss Army Bolt

As an action, you may fire a bolt energy of any non-physical damage type you choose (acid, cold, lightning, etc), at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d12 of the damage type you selected. The damage type of the spell remains the type you selected until a short or long rest. You may use a bonus action to change the damage type of the spell at the beginning of your turn, it will remain this new type until changed again. 

You may cast this spell at a high level, for each additional spell level add 1d12 damage for each slot level above first.