Colt's elemental shot

You imbue your weapon with Elemental energy. chose and energy type from the following: Fire, Cold, Acid, or Lightning. your next attack if it hits deal an additional 2d6 damage of the choosen energy.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the initial extra damage dealt by the attack increases by 1d6 for each slot.